Comment: The problem isn't lack of bags or scoops. Yes, everyone forgets a bag now and again, but there are a lot of very selfish people who can't be bothered to pick up after Fido. Regulars at bark parks usually can point out the entitled pet owner. 

These folks need fines starting at $100 and escalating to $500, $1000, and up. Plus a healthy dose of public ridicule.