If you run a website that allows arbitrary visitors to enter data, some of them will be from the EU. Some of them will also be from... let's say Iran. Should e

If you run a website that allows arbitrary visitors to enter data, some of them will be from the EU. Some of them will also be from... let's say Iran. Should everyone who runs a website open to the public have to know the laws of Iran and obey those intended to apply to their website? Should websites have to attempt to block access to visitors from countries whose laws they either don't know or don't want to comply with? Both of those approaches break the internet as we know it.