This is why I prefer the smaller conventions. SDCC seems way too big for me. The biggest con I've been to is Emerald City in Seattle and that was too much for me and I was exhausted after one day. I'll stick to the local Spokane cons
You forgot "Charge people for everything except breathing." Only because they haven't figured out how to do that. And bring in celebrities that you will never get anywhere near them or even actually see them.