Ok, so before anything gets heated up, always remember some basic rules:

-Never go alone
-Never go without telling anyone that doesn't go with you what you're planning to do
-Never go without lights, batteries, basic medkit, water and emergency supplies, and a means to contact the outside (knowing that depending on where you end up, you might have no cell signal), also maps and compass.
-Although most signs can be ignored, the ones with DANGER written on it must not be tried unless extensive research has been done on them.
-Plan your exploration. Get blueprints.
-Don't do stupid stuff
-Don't forget your camera, and if you can, a voice recorder :)