Last night we rolled with the Hydra, a staggeringly expensive piece of military hardware that flies over San Andreas like we're at war. I don't think it's a broken mechanic because it is non-trivial to fly; we've been "griefed" much more by a twat with a rocket launcher and ridiculously short spawn distances. I enjoyed batting around in EMW's new Hydra toy last night, I think we're going to see more of them during the half price sale. Here's a redditor on the subject of dealing with them.
I prefer not to "break immersion" by going into passive mode but I do like the tips on using rockets (must remember to buy some) and I think jumping session as we did last night is definitely the way to go.