OkCupid recently added filtering features to inbox, to filter away messages under X word count, or match % < N. I think this is just a more advanced version of that. I think the time spent on the top of the online dating funnel (browsing often-misleading profiles, reading their essays, and trying to start a conversation that either results in no response or an offensive dismissal) does not contribute to personal development OR enjoyment in any way, so why not minimize that time, so that a person can focus on the human interaction that comes after?

He prefers people who fill out their profiles, and like reading..... that's a bit of a jump to sociopath.

There are some bizarre and horrible things people do on dating sites. If you have had bad experiences, that's not ok. But don't prejudge this person without really understanding the effect his code is having.

What exactly is unethical about this? No one has the right to make him view their profile. If a few simple heuristics help him avoid clear mismatches and toxic conversations then he's doing nothing more unethical than any dating site that matches people up based on interests or personality.