I don't think it's anything new, I just think there are more families, kids etc. going to games these days, and the taking drugs bit is just a bit more brazen, so it's noticed more, but certainly no more kick offs than there used to be.
I was surprised to see how many were doing coke in the bogs at half time for the final against Wigan without trying to hide it in any way, I'm under no illusion it has gone on at football for decades (I'm not even that offended as I've dabbled in the past but never at a game) but do think maybe 10/15 years ago it would be something done in a cubicle or hidden away more. Maybe people are less afraid of being caught, and once one bloke pulls out a bag everyone else with one does too, and then other blokes come over asking for some.
Maybe it's just that my dad kept me well sheltered as a kid during the 80's and I never noticed it going on, but there's always been a drinking culture with following City, especially away, and know I'm not alone when I go away from home that the first thought is to find a pub or offie. I've never kicked off with anyone, but seen it so many times due to people being absolutely wasted. It's a shame as most blues seem happy drunks, just want to have a laugh and a sing song, but there is certainly nothing new with blues getting wrecked and thinking they are Rambo.