Why not help him?????
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Legal jeopardy? Or just preparing for a take over by China where such behavior is the norm.
Most likely surprise and fear as to what they are getting involved in. Most people aren’t going to get involved in some drunken street brawl with bums and dopers.
But of course that is rational. Hard to put myself in the place of anyone who would live in filthy sin-riddled San Fransicko these days.