That is me going for alms on Aalona Street Kilauea. Collecting alms, also known as piṇḍapāta by Theravāda Buddhists, is a legal activity in the USA. There are some restrictions though. I spoke with a lawyer who seemed to know civil liberties quite well, but there are no guarantees with what I say. However, this information should make sense and seem legal to you. It is legal to ring the doorbell of any house and preach to them or talk to them about politics under the freedom of speech rights.