See I'm pro freegan nugget liberating but as you said, definitely anti-this. I had a friend w an IM client in 2010 or so (maybe trillian?) with a plugin that notified him if I opened his profile to chat w him, as well as telling him whether I was
really invisible, and finally one that gave a desktop notif if i was typing to him (NOT the typing indicator in a chat window with me).
We were both into computers so he acted like it was a funny/novel piece of tech but he used it in daily life. Felt like stalkerware. You don't stalk your friends, and you don't violate their consent in the same way that friends dont use a patched snapchat client that disables screenshot notifs/keeps photos. Thats creeper shit!!!