Support direct message opt in

There are times when I try/want to direct message someone but are not able to because they are following me.

Rather than an outright reject the first time, it would be nice if the recipient gets a message asking if they want to accept the message (showing the message) and follow the person allowing direct conversation or just choose to block the person.

This way, I think it is possible to start conversations that otherwise would not happen.
 
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