A word to the wise (actually a couple of words to the wise):
NYS law — front side windows cannot block more than 30% of the light. Remember Genius's rule: only break one law at a time
You are just asking to be stopped (and giving LE a legitimate excuse to do it) if you are in a dicey area with tinted windows.
If I were to leave a SW in my car while I went to buy something in a store, i.e., she is unattended, I would be sure to have my glove box locked (my registration, insurance card and some emergency cash is there) and I would make sure there was nothing lying around worth stealing e.g., small flashlight, tools, coins, or that would have my name, address e.g., a piece of mail, and any other personal info.