While killing time waiting for epoxy to dry (I’m repairing one of the landing gear mounts in the wing of my P-51), I came across this document, which provides a lucid answer to a question I’m often asked these days:
http://www.rain.org/~mkummel/stumpers/08dec00a.html
The document explains how scammers and spammers obfuscate URLs so that clicking a link that appears to point to a legitimate place such as www.ebay.com or www.paypal.com actually takes you to a totally different location.