Kendall Jenner prefers to Tweet rather than talk, thank you!

The 17-year-old model kept mum Friday at Andy LeCompte salon when we asked about her Twitter war with Frances Bean Cobain. The child or Kurt and Courtney slammed the younger sister of the Kardashian girls for being an "idiot" by Tweeting that she wishes "things could be easier sometimes."

Frances called Kendall self-involved and spoiled, but Jenner defended herself by saying she prays for people less fortunate than she and asked Cobain who she was to judge?

Both girls are underage multimillionaires and both seem to have plenty of time on their hands to read and critique each other's Tweets ... so shouldn't BOTH these girls be volunteering at a soup kitchen instead of typing nasty things about each other on social media sites???