Best way is to try out the bbPress plugin for WordPress.
https://wordpress.org/extend/plugins/bbpress/
It tries really hard to make creating a forum as easy as possible. Depending on your theme, it should integrate into your existing site without any issues. You will need to configure a few things, so read some of the sticky topics here and post up new topics if you have questions.
Since ‘delete’ and ‘spam’ are two different things, can I ask you to confirm with me exactly which one you’re using and which status the reappearing posts are? In order to duplicate your issue, I need fairly a precise description.
What theme are you using?
This is partially addressed in bbPress RC 5. This happens when BuddyPress and bbPress are both trying to live in the same place on your site. You’ll need to change one of their slugs to be something other than “forums” and it should fix things.
Which version of bbPress are you using? 1.0.3 or 1.1/trunk?
What you need to do is check the box in your forum settings that says “Allow all users of your multisite installation to create topics and replies”
This will automatically give users that post on your forum site the “Forum Participant” role.
I’m afraid there’s no way for me to know what modifications you’ve made that might case this. Are the paragraph tags missing completely, or is the CSS forcing them to not have any margin?
I do not understand what you are trying to do.
testbp.org is a standalone installation not connected to anything. We use it to test BuddyPress, WordPress, and bbPress together in a typical hosting environment.
None. Can you try posting something over at testbp.org with the HTML you are using? If you make a topic, I will post to it to, and we can test it together on a vanilla installation.
I can confirm that as an admin, I am able to post any HTML I want to as expected.
The concept of “deleting” is one we purposely prevent, to prevent permanent loss of data. If you want to delete it forever, you can do so directly or by making a plugin to do it. In bbPress 2.0, WordPress handles this for us the way you wish for it to.
Regarding posts bleeding into other topics, I’ve never heard of that happening before. Normally if you delete/spam the first post in a topic, it realigns the following posts properly.
Can you give me exact steps to duplicate the issue?
1. Do this
2. Do that
3. Etc?
Please don’t bump topics here. The forums do not move quickly enough to need it.
BuddyPress and bbPress both rely on WordPress’s users tables, and you should be able to use either one. It’s possible that BuddyPress takes over the registration though, so you might need to do some investigating/development to get it working how you’d like it to.
Try using trunk instead of 1.0.3.
Someone needs to make a Retro Kakumei theme, which I think would be awesome.
Sounds like you have a conflicting plugin or theme. Any more details about your install that you can provide?
bbPress 2.0 is a plugin with 40,000 lines of code, adding huge amounts of capability equal to WordPress posts and pages themselves. Sadly, it won’t work out-of-the-box with 100% of all themes, and it sounds like you’re one of those cases. It’s one of the first plugins to mix custom post types with theme compatibility, so you’re literally one of the first few people to use it.
bbPress 2.0 is a plugin with 40,000 lines of code, adding huge amounts of capability equal to WordPress posts and pages themselves. Sadly, it won’t work out-of-the-box with 100% of all themes, and it sounds like you’re one of those cases. It’s one of the first plugins to mix custom post types with theme compatibility, so you’re literally one of the first few people to use it.
Change the default role in your network settings.
Then don’t. 
Use the theme compatibility that it comes with.
If you’re not happy with the vanilla configuration, you’re on your own to customize it. If you’re able to make a WordPress theme, you’re able to make it bbPress enabled. You just need to learn how like you did with WordPress.
Then don’t.
Use the theme compatibility that it comes with.
If you’re not happy with the vanilla configuration, you’re on your own to customize it. If you’re able to make a WordPress theme, you’re able to make it bbPress enabled. You just need to learn how like you did with WordPress.
Can’t duplicate. What version are you using?
You said by using that line you get a 404 error. Now you didn’t? I don’t understand.
You can try visiting your permalinks page. They might need a flush.
Only add that line if YOU have taken control of bbPress’s theming with a custom theme. Meaning, YOU have physically created all the files bbPress expects. If you haven’t, don’t tell bbPress you’ve added add theme support. This is outlined in the sticky topic at the forum index.
It sends an email to you when someone replies to a topic you’re subscribed to.
Cyclecincy is currently using the default theme that comes with bbPress 2.0.
