The description for pam is as follows: pam Adds support PAM (Pluggable Authentication Modules) However, a -pam will bork a system, and this variable should only be used in non-system package specific use flag alterations. I think there should be some note, as this has been known (a few I know at least) that has broken their system or install due to this. Reproducible: Always Steps to Reproduce: 1. 2. 3.
I agree that adding "dangerous" to the use flag description is a nice safety measure. like: Adds PAM support - disabling is dangerous!
warning added (after I broke a box today when I missed the pam use flag due to USE=-*).