Of course "Real" pirates aren't going to be stupid enough to fly a pirate flag to give you warning that they are about to cause you trouble. So anyone that thinks someone flying a pirate flag actually is one is probably not to bright anyway.
Fly yer flag and enjoy.
OR ARE THEY!?!?
Maybe those drunken hillbillies really are pirates and they've lulled you into complacency by flying the Jolly Roger all over the place. Now they are just waiting for the right time to strike!