I've travelled quite a bit, and paying fees to enter a country hasn't put me off because I've wanted to go there. But its usually a one off, and far away.
Charging our neighbours, when we are already losing tourists because of Brexit, is nuts. It will reduce tourism from the EU.
And for the "THEY'VE ALWAYS NEEDED A PASSPORT!" crowd
Pre-Brexit, EU/EEA citizens could use a National ID to visit the UK
Post-Brexit, EU/EEA citizens now need a passport
The British have always needed a passport because we don't have a National ID
"French and German tourists are beginning to avoid the UK, tourism leaders fear, because of post-Brexit restrictions on travelling with identity cards."
"When I say the F word, I am talking about fascism - fascism wrapped in red, white and blue. You may mock and you may disagree, but fascism does not come in with intentional evil plans or the introduction of leather jackboots."