If someone blocks you on Discord or unfriends you, and you have no mutual servers with that person, what happens if you delete a direct message you previously sent or remove a reaction?

I'm asking about four specific scenarios:

1. What happens if you delete a direct message after the person has blocked you?

2. What happens if you delete a direct message after the person, who has no mutual servers with you, unfriends you?

3. What happens if you remove a reaction from a direct message after the person has blocked you?

4. What happens if you remove a reaction from a direct message after the person, who has no mutual servers with you, unfriends you?

It would be helpful to have empirical evidence for each of these scenarios.