What do you think?
I don't mind it, as long as it doesn't become obsessive

When I joined, it was more "inspiring" rather than me feeling "incompetent" in any way. I guess it's really up to the individual though, but I'm not one who gets sad when I see someone else's scores: that's good for them and I'll do my own thing.
On the note of scores in signatures:
I've now removed mine, I think that post-VCE, they play no relevance at all. If someone wants to know, they can politely ask me.
However, mid last year I tried something. I was getting a /lot/ of PMs from random users regarding study tips, UMAT, etc etc. Maybe 2-3 PMs per day, which was frustrating as they could have posted a thread or searched the forums for answers -_-
So, I decided to change the scores on my sig without changing anything else (same username, mod level, etc):
2011: VCE, ATAR: 41.35 (90.4 Aggregate) - English (10), ?Physics (15), Hebrew (44), Industry and Enterprise (22)
2012-2016: [on exchange] B.Employment (Underwater basket weaving) - North Carolina State University
2016-: [aim] To get the Guinness World Record for most swag, and then rely on your taxes for future life 
I don't let my ATAR of 41.35 define who I am, and nor should you for yours. Be proud!
Guess what? I got 1 PM for the next month (which ironically was praising me for using that last line in my sig, after that PM I changed back to my current sig in guilt). Just that simple change, and suddenly next to no PMs.
So I guess my main issue is how blatantly judgmental some users can be. That aspect of AN is not cool.