Like Firefly and anonymouse (and Mishka) I feel this is a composed photo for aesthetic value rather than having any implications of trying to kill the ballerina. The noose rope doesn't look that tight in any case, so my feeling is it's not anchored to anything very firm.
Depictions of blood-curdling erotic scenes have been around for hundreds of years. Check out any old painting of the martyrdom of St. Sebastian where he is tied to a column and pierced by arrows - the sadistic ambience often looks unmistakable.