Tire Blowout problems of the 2005 Toyota Sequoia

Visible multiple cracks on the sidewall of tires (4 of them installed in Toyota Sequoia sr5), michelin cross terrain,p-metric, bought on 02-06-2009, at costco # 485 waipio hi, still on warranty,not 2/32 worn yet. Owner brought the tire for inspection at the said outlet for the tire technician to inspect, but was told that its just "cosmetic", safe to use. Owner is concerned about safety issue, an imminent tire blowout might happen. Please advise.

We bought our 2005 Toyota Sequoia brand new. It has excessive tread wear on the outer edge of the tires. We are going on our 3rd set of tires. The original ones were replaced at 28k and we are having to buy new ones at 66k. We have been diligent in rotating our tires and having the alignments done. In 2007 there was a recall on the lower ball joint for the front suspension. We complained to the Toyota dealer at that time about the uneven wear on our tires, and could it be caused by the defective ball joint. They disagreed and said that it was from not taking care of our vehicle. We told them that we had the tires rotated at the recommended times. They said the car was fine, the test for the alignment was fine so it had to be the driver. Since then I have checked out other 2005 Sequoia's and noticed the same wear problem. I have also gone on different forums regarding this subject and have found the same complaint from other consumers. At what point is Toyota going to do something? is a car going to have to blow out a tire and kill someone for them to do something about this defect? our tires are bald on the outer edge of the tread but still have another 25k miles in the middle. I am extremely cautious going around corners because the traction control goes into effect. I am frustrated with the response that I have received from Toyota. There is something wrong with the suspension. When I spoke to a representative with Toyota, I was told," that it is normal to only get 26k miles out of your tires. You can't compare your Sequoia with the tahoe or explorer. " I have filed a complaint with Toyota in 2010 and the dealership in 2008 and I feel that it is being brushed under the rug. The amount of money we are spending on tires and alignments is frustrating. I just want my vehicle to be fixed so that the tires have an even wear pattern and last longer than 26k miles.