DY my last reply was to vague for my liking here is a direct (tentative response):
Making fun of the anti-vaccine movement – should be done becasue it is not based on hosent mistake and causes harm (Although the movement includes those with tragic circumstances)
making fun of anti-vaccine individuals: if honest mistake- I think making fun is wrong
if its deliberate misleading: If harm can result absolutly make fun
If harmless, I wouldnt in tragic circumstances
Hope that helps. I am not writing this in stone though