Epcot can be a disaster during weekends or certain times of year, especially World Showcase. And disaster can be putting it kindly on the nights it’s open to 11. People try to have an entire alcoholic beverage at each country and get WASTED. I have personally witnessed that basically every time I’ve been to Epcot in the last 5 years.
I have also never seen unruliness at
Disneyland anything like what I have seen at Epcot. I’ve definitely seen a drunk person or two at DLR, but not the rowdy hoards like Epcot.