I agree that for an optional tool, Cloudflare can make any blocklist they like. People have a fundamental Right to Filter. I personally don't think it's consistent with Cloudflare's brand or stated purpose to go down this route, but that's just my opinion, people can have other opinions.
I do want to kind of question how egalitarian we are inside free speech communities about this stuff though in reality. I am fairly confident that if Cloudflare added hate speech to 1.1.1.3 or started adding misinformation to their filtering list, that is something that would show up on HN and see debate. I think a lot of people on this site wouldn't see that as a neutral act, I think a lot of people would be on here arguing that it was a dangerous value judgment, or at the very least a dangerous behavior for Cloudflare to normalize.
We all have the right to filter content, and we all have the right to choose which filter lists we'll use. But is that actually our philosophy? Would we collectively as a community be applying those same standards if Cloudflare started blocking Covid misinformation or conversion-therapy sites from 1.1.1.3? The way society debates filter lists can sometimes betray our collective ideas about what kinds of information needs more or less protection.
> or people were forced to use it
There's a separate conversation to be had here about the fact that children are forced to use filter lists. This is exactly why Cloudflare reacted so quickly to stop blocking sites like GLADD and why if it ever does offer the ability to choose custom categories, it's probably never going to offer an "LGBTQ+ information" category to block.
Cloudflare (to its credit) does at least recognize that child filters are often only semi-consensual and can be (and regularly are) abused at the network level.
That doesn't change the overall debate, it doesn't mean that making a filter list is always evil, communities still have a Right to Filter. But it is important to bring up, kids at schools don't get to choose whether or not the filters on those networks are too conservative or too liberal with what they block.
Kids (necessarily by virtue of being kids) do not have agency to decide what networks they're a part of. There are good reasons for that, but it still puts kids into a somewhat more vulnerable position, and it means there are more dangerous implications for network-wide filters than there are for user-controlled filters. This is also something that kind of gets glossed over in these debates sometimes.