I was, for 4 weeks, and my local libraries wifi is what helped me stay in touch with my parents when my phone data was shut off for nonpayment. It helped me secure a job back at home.
You need to rethink your idea of what homelessness is. It's not antisocial drug users. It's also LGBT kids thrown out of their home. It's families being evicted because the parents lost their job. Even if they were antisocial drug users, sympathy, support, and assistance do more help than turning a blind eye and hoping they go away.