You change your opinions more often than your streaky undies.See the problem with "vaulting" is that people's opinions change all the time - unless you still believe in Santa Clause like you did when you were 5?
Unless you live in a cave or your ma's basement and only listen to your own ramblings then its perfectly normal to change an opinion on something.
I know for sure 80% of fans didnt rate DCL 3-4 years ago.
I know for sure 80% fans didnt want Moyes back 2 years ago.
I dont go "vaulting" people to try "win" an argument on the internet because their opinions were as valid as anyone elses based on the evidence of that time.