Let us freely see and share the numbers. I'm pretty sure most people who want that info desire it for constructive purposes.
If it's used for harassment, let the people being harassed report it and punish that one person who's probably an ass with or without those numbers.

There are plenty of players who parse as is, and I haven't heard any widespread complaint that people are using that info for harassment. I'm sure someone's been a victim of it somewhere, but it's not a strong argument against parsing. Blame the person who misuses the tool, don't ban and fear the tool itself.
If there were a widespread issue about assholes judging, discriminating, kicking, rejecting, etc. then it's arguably more a problem with community management. It would mean that the game is attracting that negative kind of competitive crowd, and GMs or whatnot aren't doing anything to say that kind of behavior is not okay. Rules need enforcement to mean anything.

Most players honestly shouldn't even care about parses or whether they exist or not. There are multiple levels of content designed to appeal to a broad spectrum of players. There's content designed to challenge the minority of players that's actually interested in such a challenge (note I said "challenge", not "gear"--there's a difference, and the gear is just a nice reward for people who can meet that challenge), and some of this content has fairly strict DPS checks that require players to bring out the best of their job's potential, it'd only be fair to provide players with a means of determining whether they're doing as well as they can be in those instances at least.