Well, you can basically do it once with the restaurants in your new neighborhood. Otherwise it would probably ring the alarm bells for someone if the same guys are complaining and receiving vouchers multiple times. Anyway, it's a scam.

Why do you have to be near any of these restaurants to do this? I assume these are chains and the vouchers are valid at any franchise. Just spam complaints from different e-mails and never pay for food.

Seems like such an obvious scam there must be some reason it can't work.