Yup. Buying next year's badges was pretty much always one of the last things I did on Sunday. So 3-4pm rolls around, I'm like, hey, might as well buy badges for next year.
Regarding the TV screens showing badge inventory, I have a screencap of it: You are not allowed to view links.
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The thing about that chart is it's reverse from what you expect. As inventory runs low, the indicators go UP, not down. That year, we were one of the last to get 4day + preview. We were lined up at 5:15am in front of Manchester Grand Hyatt (back before crazy overnight lines were a thing). And it was so nerve-wrecking standing in line and watching the inventory dwindle.
Yeah I remember my wife being not-too-happy, because I wanted to be in line around 4/4:30 but the parking garages didn't open until 5. She was awesome & woke up super early, drove me the 20/25 minutes one-way to drop me off and then drove back home. I was early enough to get $-day+PN, but it was stressful watching the inventory disappear! IIRC I bought by badges, walked out, and then walked right into Hall H (LOOPER panel seems to tickle my memory?).
That was also the year that Member ID was first implemented. People who Pre-Registered were the first to have to make a Member ID (I think there was a temporary one and then we had to create one later?).
2011 was the "missing link" transition year from old-school Comic-Con to the modern way of badge buying
I also remember the line starting earlier and earlier each day, with some people (IIRC) camping out overnight just for badges for next year.