How many of these comments are acceptable?
Which comments are they then @whycantwegoonasthree the ones that YOU don't agree with? 
As a few posters have said, whilst you don't find people having the AUDACITY to disagree with you 'acceptable,' many people don't find it acceptable for a man of almost FIFTY to be dating a teenager. And no, they WOULDN'T be very likely to have anything in common. What are they gonna do? Take pouty selfies together, and upload them to instagram, put bloody TOWIE on, and then go on the piss at the local cocktail bar with her teeny mates?! Be serious FFS.
And how EXACTLY would people feel if their 19 year old DAUGHTER dated a man of nearly 50? You'd be fine with it would ya?
NO! You would not. So don't even pretend you would. Just don't! 
It's weird and creepy, and I seriously think a man of 50 dating a 19 y.o. girl is seriously questionable. As has been said, most normal 50 y.o. men do not aspire to dating a teenager. And most normal teenage girls do not aspire to dating a man who is bordering on being old enough to be her grandad.
I would actually question what had happened in the life of this girl to make her want to date a man who is 30 years older than her. And as I said, I would definitely be questioning HIS motives!
And yeah I called a 19 y.o a GIRL! So shoot me.
And yeah I WOULD say the same if it was a 19 y.o. BOY dating a 50 y.o. woman!
And yeah, the 19 y.o. IS more than likely to be the older person's carer in 20-25 years time. As I said, fuck that!!!
Judgemental ??? Moi?
Yes. So fucking what?