If you want an interesting read, check out the battle over seatbelt interlock devices. Optional seatbelts (with perhaps fines for non-use depending on the jurisdiction) was the compromise between none at all and cars not functioning without them being in use.
Except in the highest speed crashes frontal airbags are mostly redundant for belted in passengers (the first S in SRS is there for a reason), especially in this age of seatbelt pre-tensioners.
Side curtain airbags are far more helpful these days.
Are you pro-motorcycle helmet as well? I don't ride but my understanding is there is disagreement about the relative protection of a helmet vs compromised visibility, yet most states in the US mandate helmets. Maybe some motorcyclists could clarify.
