I think online petitions are useless in general, and though a large corporation might acknowledge such a thing, it won't sway anyone.  But who knows, it could work and if you're set on having bitcoin accepted it's worth a shot.  Then again I'm not sure what the big deal with that is.  Cash money is still the best payment method, and bitcoin has too many problems in my mind.  Better to just keep it and speculate with it.