Have you considered that "isolating" yourself from the people in your community who are most in need has had a negative impact on both you and your community? And that you may vastly overestimate the presence of crime and homelessness because of this isolation?

As someone who does take public transit on a daily basis and occasionally interacts with the homeless and petty criminals, the dehumanization of people in your own community in your comment is absolutely astounding. These people are your neighbors, whether they smell bad, have become victims of addiction, or have turned to petty crime.