Most of the "HN crowd" like cloudflare a lot, as it's quite convenient, especially for personal projects. There are a few very vocal people who dislike it for all kinds of reasons: taking down too much, not taking down enough, centralization, etc.
> There are a few very vocal people who dislike it for all kinds of reasons [...]
I'll have to agree, there are few but very vocal.
Privacy. Cloudfare-users hand a lot of their clients' data to a third party.
They terminate TLS for you.
They can, although they support end-to-end encryption as well.