Comment by reddalo

I'm not trying to defend Wikipedia at all costs, but you should also think about how much spam and trolling would happen on their platform if they didn't have these annoying blocks for non-registered users.

I run a pretty simple SaaS with a free tier and the amount of spam that I have to manage is high; I don't want to even imagine how difficult it must be to run a website where anybody can edit pretty much anything.