I agree 100%. But like I said in the previous post (and I wasn't being sarcastic), "a deflated tire is not a flat tire."

I rather have a deflated tire than a slashed tire/tube. Find out who it is and confront them.

If you put something on the valves to detour them, they'll move onto something else to mess with on the bike.

You're telling them you wanna play their game(s). Don't encourage them to continue.