Reminds me of...
The problem is not law enforcement. They have always and will always do crazy shit under the guise of keeping us safe from the boogeyman. Keeping them in check is important but, in the current environment, it is a fool's errand.
Keeping the government out of our communications is not particularly difficult. But the mobile phone providers have no interest in such things. They have no interest because of the laissez-faire attitude of the average American consumer. We want fast, pretty, energy sucking game devices with essentially no concern for privacy or security. And that's what they give us.
If you want the federal government to stop wasting money on Stingray demand end-to-end encryption from your mobile phone service.