I vaguely remember talk of how, at the time, people's drug habits where being taken into the football grounds, starting the weekend early like, or maybe just continuing from the night before. E's emerging popularity definitely had a passing effect.
I once had a chat, over some records, with a guy who was a small time dj in the early years of the UK rave scene. He said he basically gave up because the scene he was in was co-opted by thuggish types and organised crime. He's was part of some illegal party, diy, type collective and it started out as some loose group of passionate people but once raves got mainstream popular and money came into play you'd get people turning up and physically threatening you do finish your set so their dj mate could get on.