Charlotte, NC - It's late at night, you've had too much to drink & and you're stopped at a checkpoint...

That's the kind of situation a DWI or DUI Checkpoint app is designed to avoid.

Using a free Android or iPhone application you can plug in your zip code and see if other drivers have reported sobriety check points.

North Carolina MADD Director Craig Lloyd says, “Apps like this can cause a major danger."

Lloyd says the apps have got to go, “We're trying to do what we can to prevent future tragedy."

Saturday more than 300 people hit Freedom Park for the Walk Like MADD event to kick off the summer's fight against drunk driving.

State Trooper Mark Helms says drinking & driving picks up during the summer months, “Someone that's impaired, the first thing that goes is their judgment."

North Carolina ranks 10th in the nation for drunk driving deaths. Mecklenburg County is one of the top in the state.

But some say it's the behavior, not the app at fault. Joey Gladden has a problem with drunk driving, but says checkpoints shouldn't be allowed, “It's a slippery slope once you start impairing our freedom just to protect someone. You're never gonna get that freedom back."

Others say anything to stop an impaired driver is a plus.

Butler High School senior & Dream Team member Stephen Amoah says, “The simple fact that other people are at risk when they're driving. They're not fully aware or conscious of what they're doing and they could cause car crashes which could end a person's life."

Trooper Helms says he works every day to fight the drunk driving problem and DWI Checkpoint apps can only make it worse.

The trooper & drunk driving educator shakes his head and asks, “How can you explain to someone that's got a loved one that may have been killed just because someone turned the wrong way on a one way street to avoid a checkpoint because of a phone?"

Blackberry pulled the apps immediately after pressure from some senators.

They are still available for Androids and iPhones, although Apple is rejecting new ones from it's app store.