Ever heard the saying "One bad apple spoils the bunch?" Just one person can ruin it for many others. As an example, one person is arrested for rape and kidnapping and turns out to own several sex toys, magazines on bondage, and has a flogger or two hung up in his basement. He is immediately branded a pervert and a sadist and possibly a practitioner of BDSM. However, by the definitions, I just gave, we know he is not a practitioner of BDSM. A pervert, yes. A sadist, quite possibly. But a practitioner of our normal lifestyle? No way. He tossed out the two golden rules of BDSM when he chose to kidnap someone and rape them.
What two rules did our hypothetical nuisance disregard?
"Be respectful"
"Safe, sane, and consentual."
That's right, kiddos. Those are the two biggies. Those are the only two rules that pretty much everyone in the BDSM communities will agree upon. "Be respectful" doesn't mean you have to respect your slave as a slave, but it does mean you must be mindful of the fact that she is still a human and she is still a person. She has the right to have at least her life and safety respected. "Safe, sane, and consentual" means you must take your safety and the safety of your partner into consideration at all times. You must maintain a rational frame of mine, preferably free of mind-altering substances while practicing. And you must have consent, otherwise its abuse at best and rape at the worst.
Notice I used the word must in every one of those statement. That's because there is no leeway allowed in these rules. You must abide by them. They are the only two actual rules we have and they are the only things separating you from the kidnapping, raping pervert that ruins it for the rest of us.