^^^^Do you check your lug nuts before you drive your car/truck out ?

I seriously doubt if the plug vibrated out -- strange things could occur but the probability of doing that on it's own -- highly unlikely.

I know I'm anal retentive but I put a couple of winds of Teflon tape around the treads before I screw it in- don't ask me why just always did it!

3pointstar

I have heard of a few that came out on their own, but it was only when the loan payments were overdue by 90 days and no money left.

https://www.youtube.com/watch?v=iX3kxAA2L4Q

Someone stole it.

I apply pipe dope one to three times a year snug it up never a problem fifteen plus years.

Do you know what's better than loctite? .................. Cross thread!

My plug takes 2x the torque to remove after install.
If they are out to get you they will try again.

I like the optex weatherproof wireless annunciation. Have 2 in the driveway one at the drives and one on the side. Also has aux relay output to tie into lights horn etc.

If you're not going to booby trap the drain plug, at least toss some Palmolive in the bilge so it gets cleaned real nice the next time they screw with you.

It would be nice if you could catch them in the act. so you could retrieve your drain plug at their dock.