If they post you can report the post by clicking the triangle with the exclamation mark in the bottom left of a post. This seems to be slow or not really work.
I have found that PMing one of the mods seems to be the best.
Yes let us know and it really speeds things up if you either send a link to the post they’re on or their profile. There’s more ways than one to spell some of these screen names you know.
Case In point, I just checked those two names and while I found them, I’m seeing only two posts from one and none from the other, that’s why links to suspicious posts are so helpful.