Constantly in Dark Souls 3. A couple fun instances that stand out:
There's a place or two I can maneuver people to get perpetually stuck.
Invading a world but then offering the host a sign of peace as well as an item that aggros enemies against me. I teamed up with the host and helped him through an area, only to kick him off a ladder towards the end.
Cutting the rope bridge.
Bringing in poison builds into the early game areas where it can't be healed.