Seeing a lot of naive posts based on the gab news. People who really think Mastodon is a safe space obviously never used Usenet.

Spammers and trolls tend to know that the user/domain block mechanisms only work as long as you stay the same user/use the same domain.

What users need to avoid bad elements are a rich set of tools for blocking based on all factors. Even that won't stop everything, but it's more effective than blocking on only one or two factors.