I think you picked the one avenue where people are wary of the person putting on the event because you are gonna be tripping and need to be in a reasonably safe

I think you picked the one avenue where people are wary of the person putting on the event because you are gonna be tripping and need to be in a reasonably safe environment, you will get your hearing destroyed in only a few hours by some idiots who think that turning it up to 11 makes for a better show, and raving is a community of regulars that have collective memory for bad reputation. It's funny because what you're describing with the warehouse is "the afters" which unbeknownst to someone who isn't a regular has already established a reputation and been vetted by the community because they're all word of mouth. The point is that lack of reputation likely meant that despite the fact that it was public the usual partygoers weren't there. You typically need either a trusted organizer/venue or a trusted artist and their techs who's done this before and aren't gonna do something stupid.