Its a bit of a non-issue, and isn't going to happen anytime soon:
Its going to take quite a while to build up funds to buy a half decent ship - even if they do have existing allies who can bounty-credit them.
Whilst they are amassing the millions needed to buy ships and weapons, they are subject to predation from NPCs and existing E

players
There is an assumption that being a "good" player in Eve automatically makes one good in E

. Not so, Eve has no 'flight' mode, E

depends on it

That game mechanic also means that even if they did amas a sufficient number of well-heeled players, they still can't all assemble together due to E

's instancing
So, other than try to harass individual players, they cant assemble fleets to attack a station...
Not a lot to worry about. And if they did form "grief wings", I think there are more than enough E

players to take them on.
Let'em come, I say; the more the merrier!