Especially by just existing. I respect anyone's right to harass them but I think that's putting way too much energy and attention to a fat. The best piggering is when the fatty does it to themselves and there was no intent.  If a fit person was harassed while jogging and called "run fatty!" would they be annoyed? Yeah, maybe not triggered to the extent a fatty would be but still annoyed. Would a fit person get triggered because someone's working out in gym clothes? Never.