I think it CAN
make the game pretty entertaining. If controlled and kept off the table.
I will prop-bet when I play in my local league on Thursdays, but only if it doesn't affect the game.
All red/all black boards are a naturally occurring phenomenon, I think its a bit of fun to bet a few quid with someone about them falling all one colour.
I will have a bet with someone about the football if its on in the background, or if we play early matches on Saturdays and 'deal or no deal' is on, there is one guy who'll bet on the contestants box being red or blue inside - opponents choice. I'll usually have a tenner on that with him.
What I disagree with is propping someone about betting a certain hand every time you're dealt it (7-2off?) or saying "I'll shove every time I have Ace Clubs, you shove every time you're dealt Ace Hearts" etc like I see happen from time to time.
That sort of betting is bad for the game and turns a decent set-up into a crap shoot.
I see why the pro's do it...a minor WSOP
tourney with $300,000 first place isn't going to hold a multi millionaire like Negraneu or Ivey's attention like it would when they were coming up in the game. They are just playing for appearances, and maybe the glory of snatching another bracelet, since their sponsorships will pay as much as the prize money regardless of where they bust out.
Prop betting on 'amount of bracelets won' for a SIGNIFICANT amount of money kicks off their interest and forces them to bring their 'A' game.
Prop betting like that filtering down to lower stake games with players who don't have millions to throw around can only be a bad thing. Prop betting for us 'normal folk' should be saved for the sports bar IMO.