[darfs]

There is no other way to use a gun than shooting with it. (Useful! Of course you could use it like a hammer, but... Srsly.)

It's whole purpose is, to hurt someone; i think that's some point to acknowledge first.

[ajmurmann]

You can go hunting with it or shoot for fun or make yourself feel safer. What can I do with encryption other than encrypt messages I want to hide?

//Playing devil's advocate

[microtonal]

Well, there are very good reasons to hide messages.

First of all, I don't want any company in transit, from my ISP, to the message broker, to the receivers ISP to mine my data and use/sell it for profit.

Secondly, there are a lot of messages which are not illegal, but can be personally embarrassing if they were to become public. Think of sexually-tinted messages, psychological help, a kid who lives in a very conservative community and has doubts about their religion, discussions about a candidate for a job position, etc.

The problem with backdoor is that the question is not if they are exploited, but when they are exploited. And this is all assuming that the organization that has backdoor access is not of ill will.