Only administrators can see his IP address unless the data is compromised yes. However, there are some "tricks" if someone wants your IP, but if you are targeted and someone really wants your IP, you just need to not make yourself a target...
If you are really concerned with your IP, buy a VPS, make your own VPN. You need maybe 30 minutes and can find some cheap deal on LowEndBox for $15 per year
I just wanted to bring this topic back as I have some few other questions.
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The problem is,even using a VPN right now,it won't be of any help since the forum has probably recorded my residential IP before (When I registered for example)
I really think that theymos has to be more transparent about how user's sensitive informations are dealt with.
Edit:Especially that when registering with a public proxy from tor or a VPN,you have to pay a fee for it.