I hate to think allways: "I can't use this open door because there could be warping"
.Holy words!
That's how it is though - if you take the risk despite knowing there's warp, it's your fault for any contact that may happen. Unless you can fix warp in GPL for all of us, you have to deal with it just like all of us...
It's not so much of an issue though, as long as you have good ping. Just leave some additional room between yours and other cars.