It means you can't view people's reddit profiles in the UK.
( Yes, seriously. )
Many many profiles are tagged NSFW, its' not clear why, I can't imagine the majority of those have done so deliberately, perhaps it's automatic for anyone who's posted any NSFW posts ever. ( Which includes people doing so to be funny such as someone posting a huge loss in a sports sub as NSFW. )
I've been seeing a lot of profiles have their post history invisible, and thought it was a bug. I tried to search for whether or not this was possible and couldn't find it. I'm elated to hear that this is a thing, as it protects my privacy. Just enabled it (:
Only thing, shame you can only set these things in new Reddit.
I'm fairly mixed about it, personally.
Being able to inspect post and comment history allowed for finding people who are absentmindedly lying, or are otherwise intentionally and persistently abusive. I believe this was the whole original motivation about such a history being available, even.
On the flipside, it does lessen the potency of various avenues of abuse. Some people would get harassed and stalked thanks to this history feature for example, and it trivialized targeted information extraction too. It also allowed for petty censorship, i.e. some subs would auto-ban people who commented in various other subs.
One might also criticize it for being a minor bandaid over a gaping hole. Your username and user avatar you still carry across subs and are not autogenerated. This means that with sufficiently wide scraping, your posts are still perfectly correlatable, collectable, and subscribeable. Within subs, the same applies to your user flair. This has benefits, i.e. it allows you to block users who you identify as inherently malicious, but it also means that all the aforementioned benefits apply only in limited ways.
Trust requires the sharing of information, privacy requires the obfuscation of information - and so I think these concerns run contrary to each other, resulting in the many solutions of the world not committing fully to either, as they are extreme and unrealistic positions in isolation. Difficult world.
As I said it on the OP's comment but I will type it here as well, sorry if it counts as spam but
just change from www.reddit.com to old.reddit.com and then it doesn't ask you to sign up. (atleast this works in my country)
Does this work in the UK or do they still ask you to verify?
Recently Reddit also made it possible to private your post and comment history, which I found a surprising number of people already do too (default for new accounts maybe?), so this is about to become a very worldwide experience anyhow :)