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.