How to get what you want in 4 easy stages:

Have a target “thing” you wish to stop, yet lack any moral, or practical reasons for doing so?

Pick a fear common to lots of people, something that will evoke a gut reaction: terrorists, pedophiles, serial killers.

Scream loudly to the media that “thing” is being used by perpetrators. (Don’t worry if this is true, or common to all other things, or less common with “thing” than with other long established systems—payphones, paper mail, private hotel rooms, lack of bugs in all houses etc.)

Say that the only way to stop perpetrators is to close down “thing”, or to regulate it to death, or to have laws forcing en-mass tapability of all private communications on “thing”. Don’t worry if communicating on “thing” is a constitutionally protected right, if you have done a good job in choosing and publicising the horsemen in 2, no one will notice, they will be too busy clamouring for you to save them from the supposed evils.