Death doesn't scare these things, but looking like they're well on their way to being bedbound does.  The tumblr fats all like to brag about how active they are while saying bedbound is their limit.  Well, this is their future.  The only way out is for them to genuinely cut the bullshit, which we all know they'll never do.  I see all "small-fats" as budding bedbounders.