Also, noticed this. I remember this was happening in the marketplace too. Perhaps another solution would be to increase the cool down for a newbie to delete a post. Something which is separate to the cool down to post. Would give time to identify if they are abusing the deletion button without hindering them completely.
I can think of several solutions:
-Ignore Newbies when sorting on "Last post" date. This way, Newbies can't bump threads anymore.
Good idea, and doesn't hurt the users posting directly. Without disallowing newbies completely.
-Nuke all Newbies who have deleted more than x (say x=2, make it x=5 if they have more than 14 posts) of their own posts
Probably unnecessary.
-Take away the possibilities for Newbies to delete their posts
Would hinder legitmate usage of deleting posts.
-Require a captcha for Newbies for either posting and/or deleting a post
Could work. Would probably be a pain in the arse for legitimate users.