"Do it because you love me" holds true for het sex practitioners just as much but I don't recall you writing that any two people on a date are "playing with fire." Nothing you've written yet has explained why consent between BDSM practitioners is "thornier" than the consent between people engaged in any other form of sex. If you can't find any evidence to support the idea that there is a connection between BDSM and non-consensual sexual violence or that abuse and coercion are much greater problems in the BDSM community than they are for high schoolers dating, among dating co-workers, or among practitioners of any other form of sex play then it seems foolish to keep insisting that it still must be true.
John Thornton