Man, I wish I could give this a hearty “Amen” in the thread it was posted on. 
Seriously, when someone says “I’m homeless” and they aren’t asking for money, unless it seems like a cynical ploy for some reason, you don’t say, “Prove it”. You certainly don’t say, “Go be productive, you lazy homeless bum. What are you doing online, talking to a community that you enjoy spending time with?”
You are a terrible human being.