Who should be enforcing the rules of a community association?

We have rules as to parking, playing areas, bikes, dogs on leash, etc. The property management company has distributed reminders as recently as a month ago. There are some who blatantly disregard them and could care less. The board members don't think that it is up to them to police the neighborhood and potentially get into arguments with other residents. Isn't it the management who should be enforcing the rules? They have two workers on site 5 days a week and see some things but who obviously say nothing to the residents or to the management (their supervisor). People email the office but obviously nothing is done. Do others have this problem? Is it helpful to set a fine for everything? This is really getting annoying. Why should the rest of us have to follow rules that we don't especially like while others are allowed to do what they want to do. I'm ready to ask the Board to abolish all rules and let the place go to hell.