7/30/2011 4:00 AM PDT

Shanna Moakler ACCUSED Of Driving Like a Maniac!

Shanna Moakler is DANGEROUS behind the wheel ... according to a woman who fired off a complaint to the cops claiming the former beauty queen nearly ran over a kid in a stroller last weekend.

TMZ has learned ... the L.A. County Sheriff's Dept. has reached out to Moakler after receiving a tip that she drove her BMW X5 right through a stop sign at a Calabasas shopping center last weekend ... nearly striking several pedestrians including a kid in a stroller.

We're told one of the pedestrians confronted Moakler moments after the incident -- but Shanna simply dropped some F-bombs at the people and went on with her day.

The Sheriff's Dept's Stop Teen Traffic Offender Program (STTOP) has since reached out to Moakler to get to the bottom of the situation ... but Shanna says the whole thing is a bunch of B.S.

Shanna tells TMZ ... she is "seriously concerned" for the mental state of her accuser -- saying this isn't the first time she's been harassed by this person while visiting the shopping center.