Definitely depends on the airport. The couple in front of me boarding a flight in Montana had clearly just got done with some camping, and tried bringing a fire extinguisher sized can of bear mace onto the plane. TSA thought it was hilarious. They confiscated it, sure, but all the while laughing, and the couple still boarded their flight without a hiccup. Can't imagine that going well at LAX.

Edit to add: this was the same airport where some cowboys were holding a raffle for rifles INSIDE the airport. Just a whole lot of guns on a table. Ok I guess 🤷