You just don’t get it. You can spoof an IP address. You can share that information with all your friends.
The point is, you (the moderators) have the flimsiest of evidence to label someone a mechalel shabbos yet did so.
I’m not certain evidence was offered that this user was even a troll.
In all likelihood this person is back on YWN with another IP address and another username reading this and laughing at how we are still talking about this.