Is 4chan the perfect Pirate Bay poster child to justify wider UK site-blocking?

I genuinely do not understand where how the idea of building a total surveillance police state, where all speech is monitored, can even as much as seriously be considered by an allegedly pro-democracy, pro-human rights government, much less make it into law.

Also:

Step 1: Build mass surveillance to prevent the 'bad guys' from coming into political power (its ok, we're the good guys).

Step 2: Your political opponents capitalize on your genuinely horrific overreach, and legitimize themselves in the eyes of the public as fighting against tyranny (unfortunately for you they do have a point). They promise to dismantle the system if coming to power.

Step 3: They get elected.

Step 4: They don't dismantle the system, now the people you planned to use the system against are using it against you.

Sounds brilliant, lets do this.

That isn't how this came to be.

Small-c conservatism, think-of-the-children Think Tanks™ have long been a part of British politics and we go barely a week between legitimate studies and idle thought pieces where we introspect modern parenting and despair.

Like it or not, kids have access to the internet in a way that wasn't true 20, 25 years ago. Parents of teens are just realising the horrors of targeted online bullying, diet clubs, porn sharing (Snapchat and worse) and the many other small things that can just destroy kids before they've had a chance.

"But Oli," I hear you say... Yes. Parents should do better but criminalising parenting methods is hard and expensive and leaves you with a bunch of state-orphaned kids. So if we are to assume parents gonna parent, systems like this look tempting to people who don't understand the Internet.

I'm not defending the law, I just don't think this one has its roots in surveillance. It's a shitty reaction to a shitty situation.