Yes, the ramblings of a madman.
It's not the content per se', it's the amount of control and specificity that is disturbing.
If you're inviting people to your place, you're asking others to come over and put wear and tear on your stuff.
Showering? It's sort of a given that people will practice proper hygeine.. you don't have to say it.
Smoking and waiting outside? overcontrolling.
It's more a comment on his boundaries, expectations and view of others.
It doesn't stop at shit getting smashed up. Normal people would write it much differently.
My get togethers were similar in structure but I didn't put it out there like that. NORMAL people don't.
"GROUND RULES
1) There will be zero tolerance for drugs and alcohol. If you do drugs, have enough sense to keep that fact a secret from me. If you drink, I can accept that, but I won’t have any alcohol present on this occasion.
2) Don't come high/drunk/hung over.
3) Take a shower before you come.
4) Respect my hardware/home. I don't mind some intense gaming, but if you plan to abuse mine or anyone else's stuff, please don't bother to attend.
5) NO SMOKING INSIDE. If you must, just step outside (and wait 5 minutes for the wind to blow the smell away from you)."
Dude, those rules are legit. I have been to plenty of get togethers where people smell like heavy BO. While I would refuse to invite smelly people back, it's not like a general open invite get together allows that kind of control.
As for beating up machines, no there are also people out there who lose it. Let people know these things in advance before they come and they won't be likely to throw a huge fit when they are asked to leave. It's really not that hard to grasp. Social management.
You don't want people smoking around your stuff either, especially if you're a collector. I say that as a smoker. I don't let people smoke around my stuff. It affects the way the stuff looks, as well as smells. If you ever bought stuff from a smoker, you will likely empathize with the general disenchantment of opening a package that smells like an ashtray.
I shouldn't even need to touch on the drug point.
) have involved getting drunk and perhaps rowdy with other people at the hotel (for some reason my own memories of these things is a little cloudy... 
