I have never driven a hydra in a very long time myself, but I'm very much aware that the hydra missiles have the ability to inflict some collision damage on the vehicle it strikes, and the same thing happens even if you are firing it while unwanted at another criminal's vehicle, or if you're a cop firing it at another cop or any unwanted criminal, the infliction is still there in all cases. and it is certainly good that this was brought up early before it could be abused by hydra users.
The effect it has on Rustler can't be fixed by us. Would disabling firing rockets when unwanted be an effective solution?
I do support this as a solution, it shall put the inconvenience to an end for everybody's sake.