It might be good to control post spamming since the topic here are just speculations about altcoin and discussions to the altcoins. But I think, it might also affect the number of people who are willing to post in this section. Remove the spammers but not the signatures because even the whole forum have no signatures, if there are spammers around. Spammung activity will just continue to exist. If you want to change something, do not just cut the root but the whole tree.