People get hinky, but I think I'd rather get on an aircraft which understood it's risk exposure to overweight than not.
Whats utterly crap is the way large people are hounded into expensive seats on specious "it's your lifestyle" reasons: If aircraft seating dimensions cannot accommodate people then just like the ambulance services, they need to adapt to the weight profile of the community they serve.
Remember: Flying is a fully regulated market. It's not actually just their business what the seat pitch is.
Price is already sufficiently mutable that if they have to take a profit hit for larger pax, thats ok with me (I am not btw, a larger passenger)
I have flown in craft where they asked us to move seats for takeoff because the loading map wasn't working out how they expected (code share can do that if too many people get specific seat allocations outside the craft operators control) and also been asked (once) to deplane with 40 or so others, so the 747 could taxi to the far slot on LAX, and then wait to have the tires cool, before we were bussed out to board on the runway. That was an experience: midnight flight out, screaming jets, those stairs and the lights vanishing off into the distance. There is something very "metal" about boarding a large aircraft on the tarmac close to launch, rather than at a gate or on the apron.