G'day Phil,
Can we program it to reject messages from people who have taken it upon themselves to demand that people take time to format their messages according to their personal preferences when said formatting takes considerably more time than just ignoring it too?
Nuts to personal preferences. You wouldn't fill Wikipedia articles with "=Heading 1= ==Heading 2== ===Heading 3=== [[Image:Example.png]]", don't fill your mailing list messages with extra mailing list footers. Not even if you think it'd be funny.