IMO, i think our admin or devs should make limited at creat topic or make comment by "newbie" user. Such as: Must have at least 10 posts for make new topics. Addition, i pay a long time at Altcoin Discussion subforum, and i see the problem here is newbie can make comment then deleted it immediately instead of 24 hours like others rank. This is maybe a bugs of bitcointalk forum? And someone using it for make pumping topic normally follow this scenario:
Step 1. Creat newbie account.
Step 2. Comment at topic.
Step 3. Delete comment.
Step 4. Using proxy, tor,.... creat another account.
Step 5. Comment again at this topic.
Step n. Again and again.