They sure make more sophisticated bots these days...
I killed the profile... but already getting a spam bot. I researched it... the didn't log in but they registered and activated. 158 Reports against that user profile... wordpress, invision, and many other styles of systems. So it's not just Simplemachines.
You wanted more members so I went and posted the link to this forum all over Facebook and Reddit, thought you wouldn't mind.
Ooo popped our spam cherry :3
yyyeeaaahhhh lol... I'm monitoring how they're looking at accessing the site via the server logs. They still be lurking.