To be fair to the commenter, the company implementing the system is to blame. I can understand why Google (or other businesses) would prioritize customers concerned about security over the homeless. One is a more profitable customer.

Does that make it right? No. Does that mean people won’t get hurt? No. Plenty of ink on HN has been spilt about how companies act according to a profit motive, and often not in societies best interest. Recognizing this doesn’t make you complicit.