Well, it depends.
I've given up trying to work out what kind of feminist I am.
I had a fair amount of experience of working with people in the BDSM community in my twenties.
That is a very, very large community. It encompasses everything from women buying feathery underwear at Ann Summers to people exploring power dynamics in a relationship to severe, dangerous and even life threatening practises (see Operation Screwdriver, I think it was - long time ago).
I found BDSM people [these are sex people, Lynn] were on the whole very aware of power issues and more open to discussing them. So the theory is that because power hierarchies and dynamics are more openly acknowledged and negotiated and discussed, it has the potential to be empowering for women and even to guard against abuses of power.
I did find lots of troubled people in the community, although that could probably be said of many communities. I think often people are/were attracted to it as a kind of therapeutic activity. The idea of 'safe spaces', 'safe words', contracts etc all can be appealing to someone who has fear and anxiety about relationships. I think this tended to be a reason to get involved, though, not a result of the BDSM.
Although I haven't been anywhere near the scene in many years, some things I've seen in mainstream media have suggested to me that it may have changed somewhat:
I do think that the internet/porn/social media has attracted some nastier, more dangerous elements and men to the scene.
'50 shades of grey' described a very unhealthy abusive relationship, yet has been taken as a BDSM manual, unfortunately. I think it's been damaging and possibly dangerous. (full disclosure, it was so shittily written I couldn't get past the first three chapters, however I did read some interesting/worrying commentary on the plotline).
There is definitely scope for abuse and violence within the BDSM community, but whether its any worse than among the general populace, I have no idea.