DPS tracking is a weird thing. I do think the game should have some way for each individual to track their own performance. The game produces that data anyway, that's how things like ACT are able to grab the info at all. It would be simple enough to just put that in game for each individual player to see themselves and not share it. I don't think there's a downside to this.

As for seeing other people's performance there is layers to this. There are certainly people who use numbers to harass others. This is not cool at all.

There's also the other side of the coin. I don't savage raid, but I understand how helpful it is with that type of difficult content to be able to see how the whole party is doing. Groups need to be coordinated and playing at their best, and if someone is performing incredibly poorly to the point where it's genuinely hindering progress I think the group deserves to know.