caps-lock while in {talk mode} may be asked to "stop shouting, please,
you're hurting my ears!".

Also, it is common to use bracketing with unusual characters to signify
emphasis. The asterisk is most common, as in "What the *hell*?" even
though this interferes with the common use of the asterisk suffix as a
footnote mark. The underscore is also common, suggesting underlining
(this is particularly common with book titles; for example, "It is often
alleged that Joe Haldeman wrote _The_Forever_War_ as a rebuttal to
Robert Heinlein's earlier novel of the future military,
_Starship_Troopers_."). Other forms exemplified by "=hell=", "\hell/",
or "/hell/" are occasionally seen (it's claimed that in the last example
the first slash pushes the letters over to the right to make them
italic, and the second keeps them from falling over). Finally, words
may also be emphasized L I K E T H I S, or by a series of carets (^)
under them on the next line of the text.

There is a semantic difference between *emphasis like this* (which
emphasizes the phrase as a whole), and *emphasis* *like* *this* (which
suggests the writer speaking very slowly and distinctly, as if to a
very young child or a mentally impaired person). Bracketing a word with
the `*' character may also indicate that the writer wishes readers to
consider that an action is taking place or that a sound is being made.
Examples: *bang*, *hic*, *ring*, *grin*, *kick*, *stomp*, *mumble*.

There is also an accepted convention for `writing under erasure'; the
text

Be nice to this fool^H^H^H^Hgentleman, he's in from corporate HQ.