ALL CAPS vs. all small case

A site visitor writes: I actually just wanted to make a suggestion for the folks who use caps lock because they can’t use the shift key: just leave your whole message in lowercase. It may look a little “casual,” but most people will still prefer it over all caps. Just a thought. Hmmm… I guess if you [...]

What about CAPS in the SUBJECT: Field?

E-mail etiquette suggests that full caps should not be used as it gives the impression that you are shouting or indicating strong emphasis.  Does this apply to the Subject: line? Of course there are exceptions to every rule, however in general, caps are an indication of emphasis as desired by the Sender.  If caps are [...]