No, there is currently no report option, and I hope there is never a report option.
I play League when drunk or high all the time. I queue with at least 1 friend and ONLY do norms. It makes the game more fun, and a lot of the time my allies play along too. Enemy varies between being rude and telling me to "shut the fuck up, you're annoying" and joining in.
A LOOOOOT more ppl play League drunk/high than you think, most just dont openly advertise it. This goes for every video game. Communities are typically against playing "competitive" games while drunk/high, even in the non-competitive modes (norms) which, imo, is bs and you should get the stick outta your ass. (General you, not you directly)
Getting people who will join in and have fun with it is a matter of timing. Monday night at 6pm? People are just out of work/school, they're STRESSED cuz Mondays are shit. They're going to be on edge as is and something like this will make it worse. Friday night at 9pm? Everyone is at least STARTING to drink/smoke, go for it!
I guarantee that at least 30% of the games you've played in norms had one drunk and/or high person in them. Hell, I live in one of the biggest cities in the US and 70% of my city smokes pot.