This spam is getting out of hand. There's almost more spam threads
than legitimate ones. Is there any way to remove them and block the
authors? One of them (called "sexy") posted 12 spams this month alone
so blocking should help.
I don't know if Google does anything, but maybe if enough of us report
the spam to Google they will do something. To do that just click the
message, and click the "More Options" near the datetime on the top
right. Then click Report this Message.