As in members is staff? I am a staff member too, but every time I go into the school office, principals office or staff room I'm greeted by plumes of vape. 
I've complained before that I don't think it is acceptable in a school and doesn't look professional. The response to my complaint was for all the vapers to blow smoke in my face and laugh saying "don't be ridiculous it isn't harmful."
I don't really know or care if it's harmful or not, I just hate it. I hate eating my lunch or drinking tea in this sort of environment.
AIBU and a grouch?