Yes, you can remove posts from forums (if you are the forum administrator). Just open the post and click on "More > Remove post from forum". For Nabble, "remove" means "to move away". The post doesn't get deleted physically and becomes orphan (it lives on its own and doesn't belong to any forum). Removed posts can still be found under their author's profile page (click on any avatar or user name and you will see the profile of that person). Removed posts will be caught by the
garbage collector process if they don't get visits.
Physical deletion exists, but you must be the author of the post to delete it (menu option is "More > Delete post"). If you want to get rid of a spammer, you can ban the user and he/she won't be able to post again. You may contact us if your case can't be handled by these tools.