I agree with members who, as one of the anti-spam measures point to "Report to moderator button", but one should not neglect also the available option called "self-moderated thread" which gives anyone who opens the thread the opportunity to be their own moderator.

Personally, I try to make an impact in this way, and I notice that most of the users who have the intention to post some spam avoid posting in such threads. Of course, there are always exceptions, those who don't understand what spam is, or why someone is open self-moderated thread.

There is no universal solution to reduce spam posts (except total ban), but if everyone takes some of the responsibility, I think spam can be reduced to an acceptable extent.