Attention whoring would be doing anything you can in order to draw attention.

Beyond the sophistry and the politically correct crap a naked body is contra to what is accepted. In the same way you could be shitting in the middle of the street or masturbating or or or and still call it "skat activism" or "jerk activism". Adding "activism" next to something that is not societally accepted in order to get attention is silly.

I would say that my fat shaming is my version of activism because I cannot stand paying additional taxes for people that need constant medical care because they don't give a fuck if they look like a landwhale.