If you can't offer safe encryption, without backdoors, then you shouldn't offer encryption at all. No point in giving people a false sense of security. Let them

If you can't offer safe encryption, without backdoors, then you shouldn't offer encryption at all. No point in giving people a false sense of security. Let them accept that everything they say is potentially public. Eventually, they may even decide that they'd like a little privacy and force their government to back down.