[qwerty_asdf]

Well, there are a couple of angles on these machines:

  1. An overload of Big Macs eventually becomes bad for you.

  2. There's no real barrier to people helping the homeless 
     by donating their Twitter handle to this minor 
     activity.

  3. People without private personal access to the internet 
     still have public resources they can manipulate, if 
     some trivial social media account eventually nets them 
     a burger.

  4. There's no real barrier to creating unlimited Twitter 
     accounts. I could whip up 100 disposable handles at a 
     moment's notice if so inclined. Side note: how does 
     twitter feel about this?

  5. Because there are such low barriers to burger 
     acquisition, and the available inventory of burgers is 
     finite, do not be surprised when the not-so-infinite 
     supply of burgers dries up, if machines get mobbed.     
     So, while the machines are not a bottomless pit of 
     burgers (lest cows go extinct) the non-homeless do 
     clearly possess an advantage in emptying out the 
     machines. Can't win 'em all...