I'm sorry, what? You have to manually enable it in order for it to be on, or let some theme or program like Theme Customizer stick in a transitions.ini file that does it for you, to turn out rotation on. Just undo what you did to turn it on, and bam, no auto-rotate. (IE, go in your transitions.ini file and set the relevant value to 0.) If everything is auto rotating for you, you DO have force rotation on, and thus should check your active transitions.ini file.

Anyway...

I personally like setting the slide to unlock screen rotate. Now all that's needed is for themes to include a vertical background as well as all the other vertical icons, and the slide to unlock screen slightly reprogrammed/cloned to use different ones depending on screen rotation, and bam. Portrait slide-to-unlock screen. Which is something I've been wanting for a while, personally.