[neon67]

I want to make a publication delay (for example 1 month) for newly registered users — as protecting against spam.
Is it possible without a plugin, using only code?

Where to dig? )

[wpturk]

You can use this plugin against spam: bbPress – Moderation Tools

You can enable moderation for only new users. For example first topic will wait for moderation. If you publish the first topic, next topics will be published directly for the new user. Works fine for me.

[Robin W]

so you would set the default role in

dashboard>settings>forums to be ‘spectator’ and then wordpress login hook to wp-login or init

add_action('wp_login', 'xxx', 10, 2);  which passes '$user_login, $user'
add_action('init', 'xxx');

your function then would check date current user registered, and if over a month, change the role to ‘participant’ using

bbp_set_user_role( $user_id, bbp_get_participant_role() );

[neon67]

Thanks for the interesting ideas!
I will try to code))