People are buying aren't they? And I reject the suggestion that he is somehow pressuring people into buying, if you've ever been on a subway that is rather implausible.

Some people are deathly afraid of people talking to them in public, especially if they are from a different social class.

I've had people try to sell me candy on the L before. I said, "no thanks" and that was that. I imagine this is the end result of 99.99999% of interactions between people on public transportation. (Someone stole my shoes once after he asked to read my newspaper and I gave it to him. That's the 0.000001% case :)

I meet panhandlers on a daily basis who pressure people in all kinds of ways.

If convincing people to spend real money on fake farms on Facebook counts as an untapped market, then this certainly should count.