Any "well organized" event - regardless of size - will require some level of social responsibility. Whomever put on the event you attended obviously didn't know what liability they were opening themselves up for. The reality is quite sobering.
You don't have to attend a "big" event in order for it to be "well orgainzed" though. The club I belong to (the Rochester Offshore Powerboat Association) isn't big, but this year we'll have our 21st consecutive run here. From the very first event, we emphasized "safe high performance boating" and have a great reputation on the lake we run on because of it. For example, when we used to have a "radar run" after the events, local law enforcement actually ran the radar gun. Our safety record is perfect - and we aim to keep it that way. If you want to drink, have at it - but after the run. Oh, and folks still have a great time for some reason.