A long time ago I was travelling in a country where they require smut filters in internet cafes. I was a chemistry grad student, and wanted to read some journa

A long time ago I was travelling in a country where they require smut filters in internet cafes. I was a chemistry grad student, and wanted to read some journals. There was a problem because one subfield of chemistry is ANALytical Chemistry. Bayes classification was well established by then. The conclusion is that such filters don't have to work, they have to appear to work. That, and concerns about the Great Firewall.