If you get too many random invites you can report them for harassment. That was discussed in another thread waaaaaay back after initial launch.

Having a relatively new FC and finding it near impossible to find members I can understand why someone would resort to this if they are that determined to have their own fc but it does get quite annoying. Myself I am just waiting to see. Took me 2 yrs to build a ls in xi and we ended up running together with the same group for years.

A good fc is about quality not quantity