It's not just inflicting damage on the one you stole the ID from, it's also breaking laws with your own ID. If an ID is valid for 50 years, you can use it in a community for 50 years to get 15-year-olds into bars. And that's just one possibility. You can also get away with, say, driving a car without actually having a driver's license for a much longer time. There are more examples like this.The Goon said:Lets imagine we can pass for each for a second then give me a day to play with your ID and you're going to have a warrant on your name. The simple average of 2.5 years should not make anyone feel safer.
Bottom line: a limited time in which an ID is valid means that less damage can be done with an invalid ID, it means that your photo and data on the ID stays relatively current and it's a form of taxation.