How much more evidence do you need?

The elderly are now vehicularly attacking the DMV.
Officials say an 80-year-old woman crashed into the DMV building in Deerfield Beach when she went to take a state-ordered driver's license retest.

Texas, of all places is attempting to address this wave of car attacks. However, it seems to be too little:
A bill introduced by state Sen. John Carona (R-Dallas) would amend the state Transportation Code so that Texans age 90 and over would have to pass regular driving and vision tests in order to be able to keep their licenses — the licenses would expire when drivers turned 90, and keeping a license would be based on drivers passing the tests every two years after that.

90? Way too high. Try 20 years younger. 70 should be the age at which the elderly should be watched with the vigilance one gives a baby in a crocodile exhibit.