On the topic of gatekeeping, I would like to add in that this is the fear of many if they add a DPS Meter into the game incorrectly. By making it a personal thing, where it only shows your own, then it feels fair. However, then you create a stigma of static groups asking "Did you do X DPS or Y Damage?" and when you decide not to share because of toxicity it would bring, they will gatekeep you from joining a group. That's the problem. The solutions that MiaShino mentioned above are able to solve this, but it does not solve the problem of even PF going to say "Do X Damage" or "Clear this dummy". Which, in all honesty, turns more people off than other things.

That is the stigma we need to consider when adding any type of parser, personal or open, because there will be people who are judgmental about numbers and will shame you for your numbers. The harassment policy as noted in Sebazy's post does well against this, since shaming someone for their numbers counts as harassment. The amount of reports that can generate is also an issue internally, at least when it comes to the raiding community at large.