so on feb 19 we added image verification and luckily made the database backup, which i used to restore the forum after new security hole in phpbb.
probably i'll made periodic backups, depending on forum traffic, since all useful information i write down/save right away and most messages will be always restored anyway.
i mean we don't collect posts as the ultimate goal, posts just a means for development and reference for users who are looking for answers, so as long as that is generally preserved there is no big deal
