[throw_away_777]

You definitely are filtering people, unless you accept everyone who goes through the usual (tedious) interview process. This interview process is quite noisy, so being able to skip it gives a clear advantage. Whether or not this is a good thing is another question, but don't claim you aren't discriminating against people who don't code in their free time.

[AvenueIngres]

This is a hard problem to which there are no easy solutions, only trade-offs to be made. Here I think that I strike a reasonable middle-ground providing I act in good faith.

[lj3]

If this was an easy problem to solve, there wouldn't be a post on the HN front page about it every single week.