Did you read that law? It applies to “Confidential communication…carried on among the parties in the presence of one another or by means of a telegraph, telephone, or other device, except a radio”. Conversation in public is by nature not “confidential”. You are grossly misinterpreting this law and (unintentionally/ignorantly) spreading misinformation.

Edit: Another commenter has made me aware that some states do ban non-consensual audio recordings in public: https://www.dmlp.org/legal-guide/massachusetts-recording-law

The laws prohibiting these recordings have neither been upheld nor overturned by the US Supreme Court.