Thanks, Willem, for your explanation.
Now about :
Off course you can unclick this only administrator right in Tasma.
I actually tried that, and I found myself locked out of my own root account, despite giving it my root password ! Some Pardus devs helped me out over IRC and it resulted I had to manually put myself back to the wheel group in /etc/group... It worked, but I had a little scare for about 20 mn !
I am not a security expert, so I won't pronounce any judgment over this issue.
I keep on using Pardus, it still gives me good impression, apart from a locales problem that I am going to discuss in another thread.