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First off, I'd say that less than 1% of servers, even in environments that are serious about security, have MAC patches. While I do think they should be used more often, they are definately not mandatory for security.
Second, EVERY good security person that I know, would rather install something themselves from source with a watchful eye than let emerge or RPM, or swaret, or even installpkg handle it.
It is no major accomplishment to get selinux, grsecurity, and their friends installed on slackware.