I faced the same issue for myself on HN...I started obsessing over my very underwhelming score. Here's how I dealt with it:
1. I intentionally forgot my old account password so I wouldn't be able to log into it (there was no way to delete the account on HN at the time...still??) 2. whenever I had the urge to respond (which is maybe 1/100 of what it was when I had an active account), I sign up with a throwaway and make sure I enter a password that I won't remember in 5 minutes. 3. I log out and go back to my life.
It really doesn't matter how many fake internet points you have except to get you hooked into the gamification. I'd much rather not see that number. Any attention I pay to that number (which is way more than I'd wish) is a waste of time, at best.
Apart from that, you have to go out of your way to see points values, except on your old comments.