Literally ANY web service you use has this capacity. The only difference here is that its in the open. Many devs DO in fact advocate for privacy and security. nostr:npub1f6ugxyxkknket3kkdgu4k0fu74vmshawermkj8d06sz6jts9t4kslazcka is 🐏 and gives amazing tips and advice. 

Know your threat model and how to work with it. No one else is going to hold your hand and do it for you.