1) NO THEFT.
2) NO VANDILISM.
3) NO TAGGING.

Theres common sense that revolve around these rules that we follow.

1) Theft - If ever caught, stealing from places we go can increase the civil penelties in a court case or a fine, plus we're here for purely fun, not profit.

2) Vandilism - This only gives a bad name to true & pure UE's. Vandilising destroys and/or damages places that are already in a decaying if not collapsed state. Not to mention vandalising if ever noticed could make a return trip harder/impossible if someone were to ever report it.

3) Tagging - Spray painting your name or a message can also imply above to #1/#2.

"Take Nothing but Photos. Leave Nothing but Foorprints" - Sierra Club Motto