Are abusive BDSM relationships common?

I find many aspects of BDSM relationships disturbing. I am not against people doing what they want with their bodies as long as it is consentual but I feel like there are some people who say that their into bdsm who are actually just sexual predators and abusers. They are typically men who call themselves doms who become sexually aroused by beating their partners and degrading them in sadistic ways. I like rough sex with light slapping, light spanking and hair pulling but I cannot imagine wanting to cause your SO severe pain and suffering or wanting your body to be beaten black and blue. I have seen forums of doms talking about the severely painful and humiliating things that they did to their subs and it made me feel sick. Some even ignore safe words or restrict their use. I feel like since BDSM is being normalized in our culture it is giving abusers and sexual predators an excuse to harm others.