It is pretty simple. Stay out of the park..it is closed. There is no unalienable right to USE baseball fields.
Why you feel that you have to play ball so badly that you would just take it upon yourself to ignore that its closed is ridiculous OK? Act like a grown up.
And that would be a heck of an example to teach your kids...just ignore the rules if YOU dont agree with them. Jeez...and stop agruing with yourself.
You asked for an answer and the answer is go hit the ball around a vacant field somewhere else. Dont keep agruing about the answer you get because you dont like the answer.