This whole discussion reminds me of the time that someone aggressively confronted me after I left an Express newspaper on my seat on the Metro (an Express paper that I had *found* on the seat mind you, left there my a previous patron). He followed me off the Metro train, chewing me out about leaving trash on the Metro, etc. He continued to follow me out of the Metro station, crossing the street, and following me all the way to the door of my workplace, continuing to chew me out. Often he was within a foot of my face and body, without actually making body contact.
Some kind of deranged homeless guy, you might think? Well not unless he was a deranged homeless (white) guy in business casual dress on a weekday.
Perhaps he should have had a business card ready instead.