> Another factoid to consider - I know of a company that has a Class C that
> they don't use. To my knowledge, nobody has ever even asked that
> they give it up. Some automated email process could do this without
> much effort.
>
Well, almost. The IPGR robot is, in fact, doing just that.
Based on never having received such an email and knowing of
several others who haven't either, I disagree.