Park at the STP yard or head out past the airport and park at the skead recreation center.
You can find the rec center with google maps.
Let me know when your heading in, maybe I'll ride with you.
Generally speaking the OPP/Local police will lay the charge with you making a sworn statement to them regarding the trespass.
You may not have to go to court.
As far as how many times has it been done, lots up here.
I welcome you option on matters but saying the the trespasser has mental issues I take great offence to.
I in the past have had my fair share of mental issues, which i have gotten professional help for.
Labeling all idiots with mental issues is so wrong on all fronts.
Please keep comments like to out of the forums unless you have absolute proof of your statement.
I generally give a place 2 trys before I call it quits on the place.
1st try might be be not great due to who knows, after the 2nd try I generally don't go back, EVER!!!