I am running plesk 11 on Ubuntu. In the Website Scripting area when you edit a website, you can enable python, perl, CGI support and a couple of other options. (snip)
All the sites run on PHP, so I enter want to disable/lock those settings, so staff don't have to worry about them.
Reading the docs I found this http://download1.parallels.net/Plesk/PP10/10.1.1/Doc/en-US/online/plesk-administrator-guide/index.htm?fileName=65888.htm which sounds useful, but it doesn't work! I can configured the file, stopped/started psa and it doesn't seem to read it.
I edited the reseller permissions, and reseller plans to allow them to be overwritten, however that still didn't make a difference when I edited a site, or created a new one.