I had an issue with my Vodafone broadband this week, where Vodafone did a DNS based man-in-the-middle hijack of a couple of sites and put the traffic through an Internet Watch Foundation proxy server. I posted about that on this forum here.
Now, I understand why they were doing it, but what I don't understand is why other ISPs weren't affected. The sources on the Wikipedia article about IWF aren't great, but it says that 95% of UK ISPs use IWF's blacklist, and that domains end up on it only if the whole domain is for hosting illegal stuff. Is that info just outdated, now that most big sites have moved to HTTPS?
Are people with other ISPs seeing sites intermittently blocked, or is this a Vodafone speciality?