Suspension Noise problems of the 2009 Mazda MAZDA3

2009 Mazda 3; purchased new for our daughter - early on I noticed the tires were tilted, like the camber was way off. Brought it up to dealer during routine scheduled maintenance. I was given some story this was their zoom zoom suspension used on race cars. Tire wear (inside) was reaching dangerous level at under 15,000 miles with rotations done by dealership. Given excuse that harder tires would solve problem. I refused to buy tires from dealership since it sure sounded like a bunch of bs. I purchased 4 quality new tires from tire dealer with package to rotate/repair. I have them rotated every 4,500 miles. Took car in for rotation on may 9, 2013. Dealer told be tires were wearing horribly (again to the inside). I told them the dealership excuses, they suggested I go back to dealership where I purchased vehicle from. I complained and went on Saturday for them to check alignment at their expense. Everything within Mazda tolerance (surprise). This vehicle has under 40,000 miles, is driven locally to school and grocery store since purchase and is looking at third set of tires. This appears to be a major design flaw where safety is an issue with tires reaching dangerous levels well before they should. If people don't keep an eye on this situation someone will more than likely be hurt or killed. The dealer said they have been cross rotating tires to try and get better mileage or wear out of them. I showed owners manual to service manager since their book that came with car indicates standard directional rotation. Seems like everyone knows there is a problem but is making excuses so the company does not have to fix the problem.