That means no good deed goes unpunished.

American good Samaritan stabbed by Syrian immigrant in Germany after stepping in to stop harassment – An American has been stabbed by a Syrian national in Germany after allegedly stepping in to help two female passengers being harassed on a tram, according to reports.
The young man was attacked at around 12:25 a.m. on Sunday after intervening when “two men from a group harassed female passengers” on the tram in the eastern German city of Dresden, Saxony police said in a statement.