If Profile Field = Yes Then Disable Option?

[IFeelYourPain13]

I have a preference set up for members, I want them to choose yes to disable a message. What is a template conditional for profile fields?

 

[Jake Bunce]

Example:

http://xenforo.com/community/threads/forced-to-input-custom-profile-for-old-new-members.23859/#post-295326