Similiar things have been suggested before but are overseen often.
My suggestion is about the same thing, except for having it in their profile notes instead of a PM. Your profile is a place you should always be able to find
http://forums.d2jsp.org/topic.php?t=33207307&f=258 ( suggested Jul 20 - 2009
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Imo such things are nice to have because they save you from some trouble you might have.