I wanted to know it as well because for flag there's only "Support" and "Oppose" options and there's no such thing as neutral. What is it really meant to those italicized member on the flag?
They are not in the DT network. Their vote do not count.
You likely were wrong. I even can flag myself, and my name in Support List is not in italic font style or grey color
Please check it there:
https://bitcointalk.org/index.php?action=trust;u=1520746
As iasenko suggeted, users should not be able to flag themselves. Maybe it is a bug.
I can put a flag on my own account. This should be disabled as before.