How to prevent visitors from touching your system

It's not cool to touch someone else's gear...   My lady won't touch my system but she doesn't have to.  She can pick up my Tablet and play anything she wants 

Years ago we had a party, actually we had three events back to back so I picked up a $50 pair of Klipsch so I could put my Revel stand mounts out of harm's way.   

Wouldn't you know it, one of my ex's friends put his plate full of food on the speaker and started to eat off of it ....   I looked at him and said.  " Really? You are using my speaker as a table?  The dining room is over there "   What a jerk.  So ignorant 

Ever heard of a company called Invisible Fence?

Buy extra collars.

Tell him you're Doberman will rip their balls off if they do lol, mine is trained to do that.

Over more decades as a musician and audio geek than I care to admit I've never had an issue with anybody including friends, kids, friend's kids, hippies, vandals, or simply anybody mess with any gear I've owned. A drunk wife of a friend did fall on a nice guitar that then needed some repair...that's it. I consider this to be a parallel universe topic. Weird.

Re:  Deadhead 1000 and people touching my things.

"Besides, it was a just a record, my nephew is more important."  So obvious, but so true.  

Are you sure you are a true audiophile?