Banning accounts isn't a solution since the spammers will create other one...
Banning the whole topic of a shitcoin/scam could help a little bit but another scam will pop and so on...
The only solution is to educate users about the risks and the first thing to learn is to not trust blindly a stranger in the web, a Nigerian prince or a newbie in a forums... This is the ABC of the net, someone ignoring theses rules should assume what he will lose
Edit :
Banning accounts isn't a solution since the spammers will create other one...
It is a solution in some way, because they'll get tired registering new e-mails and accounts. Question here is if it would require a lot more time for the MODs (or more MODs).
Handling newbie accounts shouldn't be a problem considering the amount of patrollers on the forum.
Hope that the community will find a permanent solution...
Edit 2 :
The only solution is to educate users..
I'm pretty sure this is not a solution nor is it a feasible one. Given a smaller and finite number of users, it probably would be. However, given a unknown amount of random newcomers I would say that it is not.
Could i suggest a way to trust a whole topic by users preferably by full member +
For example :
Topic name : MMM... Trust : (-) or 1/10 with x votes then a message will appear indicating that it is a high risk investment...
Maybe this will not be possible in this forums but in the new one it could be