What I mean is that in base it is still a form of harassment as outlined by articles you have quoted, but like verbal harassment there are various loopholes. Since these loopholes exist most times there is little the GM will do outside of saying "We'll look into the issue." As Runespider pointed out, unless they are doing it at the time you are speaking with the GM you'll usually accomplish nothing calling one. Even then it'll be hard unless the GM pops to where you are and witnesses it happening a couple times.