Description of problem:
The ppp package incorrectly requires the logrotate package. All packages should (hopefully) be log rotation package agnostic.
Version-Release number of selected component (if applicable):
The logrotate package should be uninstallable.
I am sorry, but now it is too late in RHEL5 release cycle to fix this bug. I will address this issue in RHEL7 and possibly in RHEL6. For tracking purposes I am cloning this bug for RHEL 6.5 and closing this one as NEXTRELEASE.
Should have been closed as WONTFIX.