A common theme, word-usage in argument, ran through three strips today. There must be some sort of lesson here. (separate colors below indicate separate speakers):

Your friend looked kind of depressed.
--EX-friend! No stupid bird is going to tell me how to read "War and Peace"! Just because he couldn't follow the story he got mad! I can't help it if he came along when I was already up to the fifth word!
It's a shame to spoil such a good friendship.
--I say let him flock with birds of his own feather!

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Two toddlers arguing:
pfffftttt! pfffftttt! pfffftttt! pfffftttt! pfffftttt! pfffftttt! pfffftttt! pfffftttt!
I'm glad we had this discussion.

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Two adults arguing:
Lamebrain! Idiot! Nitwit! Numbskull! Cretin! Moron! Featherbrain! Cretin!
[pause as they consult book] Wathog! Dim bulb!
Onlooker: You know it'll be a lengthy argument when they have to get out the thesaurus!

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http://www.unitedmedia.com/comics/peanuts/archive/peanuts-20020406.html; April 5
Baby Blues (not yet on-line)
http://broomhilda.comicspage.com/broomhilda/index.html; April 5