I'm torn between telling my co-workers about devRant or not telling them so I can rant about work.

Do it, and keep a username that they can't find about you online.

I actually told my fellow programmers about devrant...
Btw I work in a molding company and the programmers were machine operators, most only know how to use windows as a basic user (word, internet and cam software)

None even understood why would there be a social network for programmers to rank... Like were a satanic cult or something....
Btw I'm the notion they have for a software programmer and I'm crazy as shit, always telling smart jokes, so they think we're all Wird and crazy....
Sis admin doesn't help.... He's a jerk, tried to ask some questions and he started teasing me...

Don't. Just don't. Unless you can absolutely trust them. Which is rare enough.