After Merit dealt a huge blow to spammers, spamming is still a considerable problem of Bitcointalk, of course.
Main problem are signature campaigns due to paid sigspam and also paid shilling / bumping to a lesser extent because it's not really profitable.
Most spam occurs on our Gambling section nowadays but it's not limited to certain sections.
As said in previous replies, "natural spamming" can be a problem as well because spammers can customize each spampost to optimize viewcount.
Examples are fake translations, or similar.
Another issue are trolls, recent examples are the disgusting troll digaran, because he's just here to commit abusive trolling, derailing normal topics with his bullshit, his brazen lies, his malicious intent to divide the community or even spewing hate against valuable forum members like Poker Player, GazetaBitcoin, JollyGood or me (1miau). With such trolls like digaran, they are a massive disgrace and danger for Bitcointalk.
Same like shitposters, who have opposed my campaigns to create more awareness about writing quality posts.
Or jvanname, a retarded impersonator, whose defamations are completely inappropriate and he's creating new, useless topics every day.
After all, spamming and trolling is usually a true internet problem but hopefully, moderators will do their job and go against spammers and trolls, while sane members will always outnumber these abusers and the focus is clearly on creating quality content.
Merit was a good step into that direction, maybe a de-merit function would be helpful as well.
After all, Bitcointalk will only stay relevant if we can offer quality content to attract readers and visitors, also from Google search etc.