You realize that you can report groups like that for TOS/EULA violations and get the group deleted, right?
I think there are clauses in the steam TOS that state that anything sexually, racially, or religiously offensive has a zero-tolerance policy and users are encouraged to report offending users and groups, but it's still up to you if you want to report them or not.
I ignored it and deleted the person who invited me from my friend list.
I'm going hunting for it again today.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem