You literally have to actively choose to look at the leaderboard. And you have to make your account link to your profile. So if you are capable of ignoring a thing that has no impact, and of not willfully publishing your connection to the site, you're in the clear.

Since only the first 100 get points, it's really easy to ignore the leaderboard. Odds are against you when (at least in the early days) 30-50k people are competing.