A data point for you...
I was on a train earlier this year and I was standing behind someone out with their wife/girlfriend. He had his phone in his hand the whole time with a gambling app opened (the green one, PaddyPower maybe?). I couldn't read the screen exactly but there was a list of fixtures for football matches and a button next to each one. From memory, I think each button was odds for the game, e.g. 10:1 Luton win vs Exeter or something.
Anyway, the point is that (again, from memory) at least 8 times in the journey, he opened and closed the app and clicked on 10+ of these odds buttons, while in conversation with his girlfriend who had put her phone away at the start of the journey.
I vaguely recall him checking his balance at one point too.
Anyway, I thought I'd back up your story by telling one of mine where I watched someone place 50+ bets on a 30 min train journey! It's frighteningly easy (emphasis on "frightening")
Edit: This happened a while back and I remember telling this story to people at the time so the numbers may be off but they're in the ballpark!