If you've "never seen videos of such harrassment..." you are not looking hard enough. There are literally dozens online.
I've seen this happening in America but not much in the UK. I believe harassment/obstructing people/intimidating people has long been illegal in the UK, so exclusion zones wouldn't serve any additional purpose except to prevent people who are simply offering information and support.
In an earlier post, you claimed "The pro-choice/pro-abortion lobby in the UK is incredibly powerful - if a pro-life organisation was using fake videos, they would come down on this like a tonne of bricks." If it's so powerful, how has it taken so many years to legislate for exclusion zones (or what you call 'censorship zones') around clinics and why is there still a need for volunteer escorts to help women accessing legal healthcare while running the gamut of people "praying" for them? As I've already stated, the exclusion zones would serve no purpose that the law doesn't already serve. Harassment and intimidation are already covered under the law.
Your defence of these people leads me to infer that you are probably one of the people who enjoys getting in the faces of vulnerable women and, if you're not, that you support their actions. I've never knowingly stood any where near an abortion clinic. I do support their right to offer alternative information and support to women enter clinics because I've heard many, many stories where such support was welcomed, and where the state service provider did not offer any real support for those wishing to keep their baby in difficult circumstances.
Just to address a couple of things in your many other posts: "Well as they're independent candidates, I'm guessing they all do their own fundraising." Are you actually joking? What do you mean?? If these candidates didn't do their own fundraising, then Vote Life would have to be classed as a political party, which it isn't.
"The fact is, many people do find the images disturbing, because they actually didn't know fully what an abortion involves." This is offensive and misogynistic. You are suggesting here that women are too dim to realise what is happening to their bodies and are incapable of making their own choices.
I notice, too, in another post that you've resorted to calling pro-choice "pro abortion", a phrase straight out of the forced-birthers' script. I'm not suggesting anything. I know for a fact that many members of the public don't actually know what an abortion involves. I know this from both conversations and from seeing hundreds of videos of intelligent people being shown footage of abortion, and stating they were shocked and disturbed because they had no idea that's what it actually involved.