This would make blowing the trucks far too easy. Just drive up and BOOM. The person wouldn't even need to get out, then throw a c4, then detonate it. They would just get out BOOM.
They already made it so that you can't stick C4 or IEDs to vehicles to prevent this
then simply disallow using suicide bomb while in the vehicle and disallow any vehicle damage when blowing it up near the vehicle.
also you could add a timer to the bomb before it goes off. like what happens to AI suicide bombers where they ring the phone up before the blow up. so have to be careful, if you get killed before the phone can fulling ring then the bomb wont blow up.
Totally unrelated to this post topic, but the whole "phone ringing" thing for suicide bombers is REALLY fucking stupid. phone bombs are used for IEDs (roadside bombs) and remote detonation... not for suicide bombers.
This also makes it extra stupid when THE PHONE IS ALREADY RINGING, but somehow killing the guy magically stops the bomb from going off. Thats just not how that works...
Really wish they'd go back to the tried-and-true "ALLAHU AKBAR!"
One of my favorite moments in siege was at the start of a round at the dostoyevsky cafe or whatever its called. The team spawned and a guy was like "yo guys, come check out my dangle." So all of us huddled around him and BOOM squad wipe, he had been cooking a grenade lmao. The other team was so confused. As glorious as that was ... no thank you, senpai.