There are, I observe, two (at least, but for our purposes here) major themes running through the expressions of anti-BDSM (and other forms of "patriarchal" sexuality) sentiment. Roughly:
1) This is exploitive, or, at minimum, is reflective of our exploitive culture, and thus, should be shunned, or at least seriously critiqued.
2) Ew! Ewwww! ICKY! (shudder) EW.
Expressions of 1), provided they're argued with some thought and research, are worth taking seriously as feminism, whether or not one agrees.
Expressions of 2), not so much. And honestly, I've been seeing a lot of 2) lately, and, well, frankly, it irks. "What you do is gross and nasty" is not "radical feminism," nor yet is it a critique. That is high school. ("Oh. my. god. canyouBELIEVE what she's WEARING?! do you HEAR what she DOES?? psstpsstpsst"). Speaking of conformism. Speaking of conservative.
As for the "help, help, I'm being oppressed by what you do with another consenting adult in your bedroom/private sex club!" folks: you can fuck right off. Really. Speaking of control issues. There's more to power than leather and chains...or patriarchy. It'd be more convenient if it were that simple, I'm sure. But it never is.