Don't know. I was working under the assumption that channels that required invite status (SG or other private channels) had some decent crypto behind them.
So he may be able to tell that there is something in the area, but I would assume that he can't see what it is.
Edit: missing words are bad
-Terry
-----
"so listen up boy, or pornography starring your mother will be the second worst thing to happen to you today"
TF2: Spy
So he may be able to tell that there is something in the area, but I would assume that he can't see what it is.
Edit: missing words are bad

-Terry
-----
"so listen up boy, or pornography starring your mother will be the second worst thing to happen to you today"
TF2: Spy