Bums collecting cans in a park = profit generating. Are the cities going to clamp down on that? What i think happened is a SM city official got pissed off because people were working out at a park close to his/her house, and decided to do something about it.
BTW GEYF is a 501c3, and is charged for use of public facilities. Even when you want to have a birthday party at a local park, you have to pay a fee. Pretty sad, considering that fee is already paid in the form of taxes.