This is a decent suggestion, but limited. I'm similar to moridinamael (except I find my cliff isn't as steep; 6 is when I start feeling my ability degrade and ~9 is where it's almost gone), and I find it easy to see most people as irrelevant in technical contexts (lectures, work, etc.) but not in most social contexts. If I'm at a party with 12 people, the only way I've found effective to stay talkative is form a subgroup that's 5 or fewer and just focus on them. Writing off active participants is a recipe for awkwardness / hurt feelings, which shutting down prevents.