* Treat all gear with the utmost respect.
* Ask if you're not sure how to operate any gear, or you're just curious about the system setup. Some gear requires headphones to be plugged in at all times, some gear doesn't like it when you unplug headphones unless the volume is turned all the way around. Don't just assume that everything works the same way. Just ask, it can save a lot of heartache.
* Some gear is really, really, really, really expensive. As previously stated some member and manufacturer rigs are going to cost more than some of us make in a year.
* Other gear... the owner only thinks it's precious. Respect the owner's wishes.
* Give it all the velvet cushion treatment.
* If you have any doubt or questions, ask.
* Do not place headphones on top of other gear--if you're not sure where to put it, ask the owner.
* Do not remove any gear from a setup without the owner's permission.
* Do not remove any cables or make any other changes to the setup without the owner's permission.
* If you do take gear away from a table, or borrow cables, adapters, or power strips, try to remember where you got it from, and bring it back when you're done. In all the excitement, it's easy to forget where you got that 1/4" to 3.5mm headphone adapter.
* If you listen loud remember to lower the volume for the next person.
* If you don't know or are just curious about something, ask someone. Anyone. Someone knows, or knows someone who knows.