Almost every time I've discussed Twitter w academics who don't tweet they say "it's a waste of time — no signal" even though I've never argued w them 1 way or the other. I mean OK they aren't 100% wrong since anything can be framed as a waste of time, esp w these types of ppl. 
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Have you found (having a basic acquaintance w/ people) Twitter to be helpful also for those situations then? I've often heard this claim being made sort of 'on behalf of' introverts. -
Yeah, often people come up and talk to me because of Twitter. I have to say though that that can also be intimidating as well as really fun and nice. As with all social interactions, context matters!
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