Earlier quoted context omitted.
Awesome? Being a young law-breaking prankster almost universally means being an asshole, in my experience as a once-young once-lawbreaking asshole. To be unembarrassed by it as an adult is to bring into question one's maturity.
You're really reaching here. The prank was awesome, and you're generalizing pranks to being an asshole. If you're embarrassed by a prank like this as an adult that doesn't make you mature; it makes you boring. Nobody got hurt so how was anyone an asshole?
The Headroom prank interrupted TV people (presumably) wanted to watch, made broadcast engineers scramble, and may have even gotten a few woken up in the middle of the night. I won't even speculate as to what kind of pains-in-the-ass it almost certainly caused throughout the network and at the FCC going forward.
You really cannot see the asshole quotient here?
Pranks should be between friends, not unsuspecting strangers.