[quote CaraDuneRedux]@Bluegrass in theory BDSM is already covered by legal precedent in the form of the Spanner case where a group of men engaging in consensual BDSM (specifically, nailing each others' scrotums to the floor, IIRC) were charged with ABH, and found guilty. As far as I know (not a lawyer) the legal precedent still holds good - in English law you cannot consent to ABH even under the pretext of consensual BDSM.
However, as the cases detailed on the "We can't consent to this" website show, this legal precedent seems to be conveniently forgotten where the person on the receiving end is female, especially if (conveniently for the perpetrator) she's dead so can't contest his account of events. Men regularly get away with murder.
So yes, I absolutely would like consensual BDSM which leads to ABH or carries a risk of death criminalized. It wouldn't stop couples who genuinely wanted to do it from engaging, but it might make them a bit more careful, and it would close a loophole in murder trials meaning there was no wriggle room for a man to say "I only meant to cause her a bit of the pain she asked for, not her death." If he knowingly engaged in a practice which a reasonable person (the famous "reasonable person" in English law) would conclude carried a non-negligible risk of death, he could be done for murder.[/quote]
What you are arguing for the law to be, is exactly as the law currently is...as you described yourself.
It's not legally possible to consent to assault/ABH therefore all practices which could cause physical/severe mental harm ARE currently illegal.
The problem is, those implementing the law conveniently seem to forget this. It should never be possible for a man to evade assault, GBH or manslaughter charges, using the "she asked for it" defence, because NO such defence currently exists!