You get no support from Feds, but they're normally shooting each other, so you can join in with one of the ships (or a wing) to defeat a difficult ship (or wing), or you can pick on any ship/s you want. If you have no bounties on you, they don't normally attack you unless you fire first, but I noticed that when I had a lot of bounties on me, I was getting unprovoked attacks. I don't know whether It was because of the bounties or whether it was something to do with allegiance. Now that I'm clean, I haven't been attacked the last couple of times I was at a HazRES