I honestly hadn't considered that when I asked someone to use Signal or Threema instead of Facebook Messenger that they would think I was a pedophile or drug addict. Food for thought.
For what it's worth, I don't think using Signal or Threema is enough to make you an E2EE enthusiast, and wanting to speak without your speech later used against you is maybe the purest reason for E2EE. I meant more so the type of people who are into Tor or I2P.