Is she the "meanest mom on the planet"?

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Jane Hambelton calls herself the meanest mom on the planet. She listed her 19 year old son's 1999 OLD Intrigue after finding alcohol in his car. Her ad reads "OLDS 1999 Intrigue. Totally uncool parents who obviously don't love their teenage son, selling his car. Only driven for three weeks before snoopy mom who needs to get a life found booze under front seat. $3700/offer. Call meanest mom on the planet". Many applaud her ad; obviously, her son is not happy and claims that the alcohol was left by a passenger. Do you think she overstep her boundaries? Should she have made the problem open to the public?