But as the guy who invented Facebook should know, status updates are prone to change.
Why do you think young children might be prone to such cruelty?
I'm prone to like defense cuts as a solution to budget problems.
c.1400, "naturally inclined to something, apt, liable," from Latin pronus "bent forward, leaning forward, bent over," figuratively "inclined to, disposed," perhaps from adverbial form of pro- "before, for, instead of" (see pro-) + ending as in infernus, externus. Meaning "lying face-down" is first recorded 1570s. Literal and figurative senses both were in Latin; figurative is older in English. Related: Proneness.
Lying with the front or face downward.
Having a tendency; inclined.