1. The "burn after reading" feature is added to the github issues list (As a "Feature request"). 2. Yes, but you control the way of you share it. 3. Thanks. 5.

1. The "burn after reading" feature is added to the github issues list (As a "Feature request"). 2. Yes, but you control the way of you share it. 3. Thanks. 5. I wait some spams... However, 1 paste per X secs is not difficult to implement.