Yep, because common courtesy=BFF. After that, he'll probably follow around friend groups who look like they're having a good time, or people cosplaying from the same series/game and try to ooze in, failing horribly.
For anyone interested, based on location and time, I'm going to say the con in question is most definitely Youmacon: (
https://www.youmacon.com/). The biggest convention in Michigan/surrounding Canadian area. Also one of the few that's in autumn rather than summer. As it generally occurs during Halloween, people also tend to bring candy and cosplay trick or treat. Nothing very "formal", just here, have some candy, oooh trick or treat can I have some too? Lol sure. Kind of stuff. If you've gone, you know. That being said, there is potential for some serious milk footage of Adam doing this. If you're going, be on the lookout!