If the idea is to do something cool to an adblimp, we already have them. If someone REALLY wants to RP shooting one down, leave detailed @notes about your caper for the GMs.
If the idea is to code a vehicle, I don't see it happening. We already have aircars which just aren't used. Adblimps would be autopiloted, not manned, and, blimps as a vehicle is just not ... I just don't see it, in Withmore.