He rather overplayed a couple of criticisms about an episode of the IT Crowd. A few people expressed dissappointment with it and pointed out a plot similarity to Seinfield. He banned comments, deleted posts and posted a picture of Comic Book Guy from The Simpsons as his retaliation.
The Comic Book Guy thing was crossing the line slightly, since he'd effectively dismissed anyone who wasn't overwhelmingly positive as embittered nerds. And it was a case of him deleting anything that wasn't overwhelmingly positive, he singled out a comment I wrote during all the furore as 'a rare example of constructive negative criticism' when I didn't consider what I wrote to be negative at all. In-fact I enjoyed the episode with few reservations and was trying my upmost to be supportive as I empathised with the guy. It was negative because I didn't fawn like everyone else on the site, I merely enjoyed it without thinking 'ROFL MATT BERRY IS AWESOMES!!!'.
Acting on criticism and being thin skinned can exist in tandem; I'm very senstitive and will be petulant after criticism but it becomes apparant I've took in what they've said later when I'm tackling a similar project. But at the time it feels like the worst thing that's ever happened to me. I think if you listen to the Father Ted commentaries it's clear Linehan in critical of what he does, which is why at the time people who criticised him were astonished he responded in that way, they assumed he was thick skinned. It must take him a bit of time and distance to be able to analyse was worked and what didn't.