How to deal with spam in comments?

Question

Fight against spam

For some time now, he has been spamming alone in the comments, or rather, he advertises his product, a ban on account and ip does not help, he creates a new one, changes ip. Any suggestions?

Answer 1

Like pre-moderation.
And why did you write here in full, spam?

Answer 2

If it doesn't interfere much, then leave it, let's do without prejudice about the "it's clear what" product, if you have free time - delete it.
Cut with spaces.
Range wide or narrow, what kind of IP addresses?

Answer 3

For me, pre-moderation is the most appropriate choice.

Answer 4

Given the putrid smell of icq, maybe it's worth deleting messages from icq?