SHOUTING; emphasis?

[RonButters at AOL.COM]

In a message dated 9/8/02 10:14:40 PM, dumasb at UTKUX.UTCC.UTK.EDU writes:

<< I have been using email on computers since the early 1970s, and I have
always been told that all caps is a convention that is the equivalent of
shouting - UNLESS the author explicitly states that the caps are to be
interpreted in some other way (commentary in text, for instance).

Bethany >>

So are you "shouting" when you write "UNLESS"?