I wasn't thinking minorities in particular, but such a proxy-block does prevent the status-quo from changing too much/too soon in any one direction.
Seasoned programmers will still come in all shades, since "5 years experience" can still be done at home... that's how most of the early guys did it. The key is, rather than look for a job, they used what they learned to create their own businesses (mostly porn back then, but a lot of e-commerce in general).
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