Imagine if they had been around from the start?
1963:
"I don't like this new show. Doctor Who? What a stupid name. Its's just some old bloke who lives in a junkyard with his grand daughter. He's not even a real doctor I bet."
1966:
"So, they recon they can just put a new bloke in place of Bill Hartnell and it'll be fine, do they? I won't be watching it ever again! Bring back Susan I say. it's been rubbish since she left."
1970:
"OMG! BBC say they're going to replace Troughton with Worzel Gummidge! I bet Aunt Sally will be the new companion! Well I won't watch it any more. Bring back Victoria! It's been rubbish since she left!"
1974:
"Who the **** is Tom Baker? He looks like someone on acid! There is no whay they'll take him seriously! What is with that scarf in the publicity photo? Seriously... And (Spoilers) They say he'll have a mechanical dog! WTF!!!!??!?!?!?!?! Bring back Jo. It's been rubbish since she left!"
1982:
"OMG! The new Who is going to be a vet! Keep him away from K9! Bring back Romana! It's been rubbish since she left!"
And so on!