I much prefer RACK -- Risk Aware Consensual Kink! :P

Everyone everywhere is into different things. They will all have different definitions of what is wrong or gross or excessive. In broad terms, I agree with bipolarmed's response. There are all kinds of semantics but I try not to go too far into those because it just delves into a point of silliness.
There are SOME fetishes that can be somewhat dangerous in & of themselves. Erotic asphyxiation is a tricky practice that kills a great number of people accidentally. Playing with fire, blood, & sharp objects can also sometimes be risky. It's all a matter about being educated, careful, & being sure to have an equally informed partner.