It’s anecdotal but me and my partner haven’t had much trouble with TSA in major cities. They’re either genuinely to busy to care, or you have to act like an asshole and piss them off to have a problem happen. But if you’re flying from a major Canadian city to someplace like LAX, no TSA agent is going to bother you give you the time of day.

I would avoid smaller airports with less traffic though. You might run into some bored hicks and that is a recipe for disaster.