I completely agree. The point I was trying to make is that there are wildly different variations of what is and is not consensual behavior. For folks who actively participate in the BDSM community the social norms are very much in favor of clear, adult, responsible communication. However, there exist lots of men and women who have inclinations towards BDSM and are turned on by BDSM practices who have never been introduced to the community and have not learned these "best practices" in terms of communication. This means that there are many men and women who enjoy and like aggressive sexual advances who have never been taught how to communicate their interests as an adult, and that entire population of people who are inexperienced create a grey area. BDSM and other non-vanilla interests going mainstream would go a long way to raising the general level of discourse and communication about sex in general.

Just to be clear, please don't take my comment as excusing the problems people have raised here, but as simply an impartial anthropological description of the reality of the world.