Is it stable to use epel and rpmforge in the same time?

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http://unix.stackexchange.com – So after a fresh Scientific Linux 6.3 Desktop install, I: yum install rpmforge-release && yum update and yum install epel-release.noarch then: yum install wine gparted cups-pdf && echo 'includepkgs=nss-mdns wine* gparted cups-pdf' >> /etc/yum.repos.d/epel.repo OK! After this I: vi /etc/yum.repos.d/epel.repo includepkgs=nss-mdns wine* gparted cups-pdf So this is how I install a fresh wine (+cups-pdf) and gparted. Q: Is this a stable thing to do? I mean can this cause problems in the future? (that there are some epel packages installed, but I use a whitelis (HowTos)