This is one symptom of technology overcoming law. The simple fact is that if the average law breaker would encrypt their data with an easy to remember, but long and difficult to break password, then law enforcement would never be able to do the job for which we pay them.
This would lead to a bigger problem for all of us - the internet would be fundamentally changed to allow law enforcement to see everything you do as you do it. Our privacy to do what is currently perfectly legal may be corrupted to a point where somebody would start looking at any one they don't like just to put them in jail for a few days. Most everyone commits some sort of criminal act in their daily lives.
It's illegal to throw soda cans in the garbage, it's illegal to spit on the sidewalk, it's illegal to pour oil down the drain, it's illegal to speed, it's illegal to wear suspenders (in some places), it's illegal to use a "rolling stop", it's illegal to use certain words in front of minors, it's illegal to use various natural drugs, it's illegal to pat someone on their back without their explicit permission.
I'm sure you can easily see where you could go wrong. Yay for the little guy for taking a small hit to avoid a much larger hit. Still, he *probably* likes little kids, but so long as he "sticks it to the man", it's all good. Never mind that he could maybe rape your little girl some day. On the other hand, I certainly don't want to live in a world where the police can just choose to jail me because I won't tell them my password.