Do members of the wider public view BDSM or BDSM folk as a personal threat? Do they feel they might get involved in something without wanting to be there? Is it uncertainty?
Is there any similarity between this and how GLBT is or was viewed?
What is abuse and how does it relate to all this?
In some jurisdictions, abuse is defined in terms of physical consequences (e.g., cuts or bruises) or physical actions (e.g., tying some up). This can be a judicial convenience---along the lines of needing to have a certain amount of cash on you or else you can be declared by police to be a vagrant---so that the police and courts can easily deal with abusers, but how does this relate to BDSM where bruising and physical punishment can be a necessary component of a healthy relationship?