Could be in any context. I do it a little on UFC fights but that’s a relatively low amount and I can afford I to lose any time I do. It seems like it’s becoming a really wide spread problem though, at least in the US. At the same time I don’t see why it should be illegal. Granted I also don’t think any drug should be illegal.
Gambling is (mostly) a poison. I don’t condone sports gambling, I don’t go to casinos. I do like to play some poker and fantasy football, but there’s a large element of skill to those. It’s not as bad as playing slots or betting on the ponies IMO.