Nah, not a Beta Tester.
Account was created in 2006, meaning he's far past the Beta Testing now.
Beta Testing ended around December time of 2005, ended at a specific time, meaning some players still created their account on December but the server testing didn't officially end until a specific time which would be their local time.
Anyway, that aside.
This person hacked the hat, not even Beta Aged.
How did he hack the hat?
Club Penguin made a foolish mistake of not blocking out items when they launched their My Penguin app and allowed item adders to use this mistake to their advantage by creating public tools for people to use.
Some people were not banned because they didn't wear their hats on full servers where Moderators would be to ban these cheaters.