It's actually etc/hosts, even on Windows -- no .txt. </pedantic>

Technically i's c:\windows\system32\drivers\etc\hosts on windows. And it's hidden by default too.

I know, hence the absence of initial slash :)

I suspect that it is easier to teach people tor than to teach them how to change the host file. Not that we need to, there are plenty of anti-censor browser plugins nowdays.