Jerry, I am sure we have all seen some pretty strange stuff, and in a lot of different places. Just as I have seen some unusual and/or persistent characters (to state it mildly) in the real world, I am also aware of some on the internet. Indeed, some friends that I have met have related to me experiences they have had being harassed (on the internet) by persons they have encountered in some of the chat rooms on the internet. Now, I am certainly not skilled enough right now to use an IP address to stalk or harass someone, but I suspect that one could learn how to do so. So, it is solely in keeping with my general philosophy of maintaining as low a profile as possible as one of multiple means used to avoid circumstances where confrontation could arise that I suggested an increase in security on a public board. Certainly I am not arguing that it is a privacy issue in a legal sense, and I will certainly continue to participate here regardless of whether IP addresses are posted. And indeed, I may be raising a concern over nothing if the the apparent former heated exchanges did not result in any extra-cirrcular exchanges. But I guess it is better to raise the issue and give it whatever consideration may be due, rather then to be unaware of the issue at all.
Your concern over multiple ID's is a good concern. And I guess showing the IP address enables all to ascertain when there is a case of multiple ID's by the same person when they are connecting through the same server. So in that sense, it does provide some useful information to the reader, but is not the concern more one of what is said (i.e., disinformation, flaming, etc) rather than who is saying it (particularly if a user cannot be banned from the board)?
Whatever you decide to go with will be ok with me. It appears not to be a concern to any others, so perhaps I am just overly cautious or paranoid. I defer to your judgment and experience is discussion board mamagement.