Can't really see why you should be? You've obviously been here long enough to be a real part of the community here, and as for pictures being stolen from you, you run just as great a risk here as on any other site on the net that you may post them on.
If you're saying you have pics in your gallery that aren't of you though, and you don't know where they originated from or have permission to reproduce them, then yes, I'd say they probably should be removed to be on the safe side. You could always keep them in an offline personal collection if that's what floats your boat.
I/we don't post pics here, but we are always seeing people having their accounts closed on flickr for rebroadcasting others pics without permission.
Not my call, but I'd imagine that's the position the mod's would have to take.