This is actually one of the single most stupid questions I think I have ever gotten.
Bondage and BDSM have nothing to do with rape & or abuse.
For one: A submissive and dominant relationship is one founded one a level of incredible trust I mean next level trust
Two: At no point is a dominant actually trying to outright hurt his sub and if he is well then theres the start of an abusive relationship and he should seek help before he starts hitting out of anger
Three: They have a set guild line that they follow with safety words and if not safety words it is spoken about before hand (See Hijynx cam girl and her dom for great proof of the second)
Four: A dominant has after care and shows great levels of respect to his submissive if not love and it brings them closer
This is in no way close to rape or abuse where the woman has no choice and is forced to do something against her will under the threat of violence or loss of life or black mail anyone who can rape or abuse can no longer be called a man and should no longer be allowed in our society.