Literally this.
I don't know how things stand on NA or JP clusters but on Chaos I would guess around 50% of the PC players at least parse occasionally and even more parsed at least once just to see what it's all about. Thing is, people just don't even care too much about other party members. In 90% of the time it is basically just to see how well they perform themself and their friends who are with them.
Sadly the other 10% where people move out of their way and confront others negativly with their numbers or even go so far to activly harrass are the only times we can be sure parsers were running. So it's hard to tell actual numbers and compare them to make a point.
We have some of those on Chaos as well. While I could join those partys cause I meet the criteria I would never do. It's usually trap bait and I try to stay away of those.Still nothing I would consider harrassment or discrimination. ö.ö Just something to shrug about and move on (and do some jokes about with your triends). Let the idiots be idiots and wait in their unfilled party forever. ^^