Despite the communities best effort the plesk , cpanel and whm have recently been resurrected again.
I have taken the liberty to follow Michael Hampton's suggestion and added warnings that explicitly state those labels/topics that are off-topic.
Wiki Excerpt:
Off Topic Warning: cPanel | WHM | Plesk control panel questions are generally considered off topic for ServerFault.
Full Tag Wiki:
cPanel | WHM | Plesk is web hosting control panel that is supported by vendor
example.com#Off Topic Warning:
The majority of questions regarding the cPanel control panel are likely to be closed as they are not considered on-topic for ServerFault:
Questions involving web hosting control panels are off-topic at Server Fault because they customize their systems such that normal administration tools and methods no longer apply, and thus require support from the vendor or the web hosting industry. See Where can I ask questions about web hosting control panels?
There have been several discussions on meta.serverfault.com regarding this policy.