Is urinating on someone's stuff a misdemeanor in NYS?

Have him committed for a psych evaluation to see whether he still has a brain?

Deliberately destroying someone’s property, by any means, is vandalism and a crime.

“Because the destruction of public and private property poses a threat to society, modern statutes make vandalism a crime. The penalties upon conviction may be a fine, a jail sentence, an order to pay for repairs or replacement, or all three. In addition, a person who commits vandalism may be sued in a civil tort action for damages so that the damaged property can be repaired or replaced.” Source

It’s only a crime if she gets the police involved

Legally, perhaps vandalism or destruction of personal property, but he also risks his room mate beating the snot out of him.
Tell him to grow up, move on like a man not a 4 yr. old.

Quite sure that would be felony vandalism, actually.

Also, depending on how zealous the prosecution is, he could possibly be charged with a sexual offense as well. I wouldn’t rule that out.

The roommate can call the cops and file a report for vandalism, it can also be considered public indecency.

It would not describe urinating on someone’s stuff as a misdemeanour, I would describe it as pathological.

Probably too late now but I was going to suggest that you pee on one small item of his so that he gets the idea of being the recipient.

Not only do I think it’s morally corrupt to consider vandalizing another’s belongings…I also wonder why on earth one would want to attach themselves further to the person he’s supposedly had a “bad relationship” with.

I would instruct him to break away from her promptly without causing any harm to her items or his character. It would be much wiser to leave and make no further contact with her.

It’s immature – your friend should let it go and be glad the roomie is out.

[Mod says] The Question is in General, and asks what the legal repercussions might be if the person follows through with their plan. Please be helpful and stay on that topic.