Is there something so offensive about HTML that would cause a person
to be taken aback? Yes, html messages are more in byte size, yes they
support graphics which some people don't care for...but don't compare
html messaging to being arrogant as if to say, "haha...i'm going to
change your email format all around just because I can!" Don't akin
changing formatting to plagiarism. Just my two cents
And if I chose to format my replies in some proprietary but globally
usable document format (albeit perhaps by adding software installs)
then, gee, everyone should accept my e-mails because of my choice
despite the sender's own choice of format. Well, that means everyone
replying to your e-mails should also change the format just to piss you
off, too.
Not every has access to their own e-mail client at all times. You may
get stuck having to read your e-mails using a client that doesn't
support HTML. For example, you may not be able to poll the mail servers
and the webmail interface doesn't work right now in your web browser but
you might have a shell account to use a command console to use 'mail' or
another e-mail client to look at your e-mails but that doesn't render
HTML-formatted e-mails and simply shows it all as text.
HTML will always DOUBLE the size of your e-mails: there's one plain-text
MIME part and another HTML MIME part for HTML-formatted e-mails. That
means longer download times for double-sized e-mails. Not everyone has
high-speed Internet access as do you so a 15KB message that bloats to
over 30KB is no big deal for you. There are still LOTS of users on
dial-up. They don't appreciate you bloating your e-mails will fluff
that they can't read or cause them to consume more of their quota
minutes for their dial-up access. Your one e-mail that is rude in
bloating the size of your reply is still probably no biggie for the
dial-up user for just ONE reply from you but will quickly become a
nuisance as the size of your e-mails go up, as you send them more
wrong-formatted replies, or if others are just as rude as are you and
they get lots of e-mails which results in them doubling the consumption
of the dial-up connection time quota.
Responding in a different format than used by the original sender is
rude! It is also deliberately choosing to be ignorant and wanting to
see your pretty e-mails as you like to see them without regard to what
the recipient wants or what they can handle.
The OP says they "understand" the choice in Outlook to use the same
format as the sender when returning a reply. Their "understanding" is
"I don't give a damn about what you like or can use so you will get what
what I like". As a recipient to such a sender, I'd probably give them 2
warnings and thereafter upon further abuse would simply block this rude
user and send them an e-mail telling them that no further e-mails will
be accepted from them.
If you refuse to use the same format in a reply as was used by the
sender then just don't bother replying.