Hardcore gamblers' tendency to lash out at athletes, when bets go wrong, can get really scary. This is Point No. 2 in Thompson's analysis -- and it deserves a closer look. From what I've seen, the level of threats, abuse, etc. is just horrifying. The 30x increase in money bet, sadly, seems to be translating into a 30x increase in betters' hostile conduct.
I've seen a huge amount of videos of sports fans having melt downs when their team/player loses, to the point of destroying their own TVs and attacking their guests. I have to believe gambling is a factor in this behavior.