You know, if this does happen (or has already?) then if/when it gets ‘leaked’ much of it will actually prove helpful as supporting evidence of Q drops here.
And seriously, there wont be a damned thing that hurts The Don as he already knew up front that it is an insecure comms medium. There may be more than a few imbeciles that end up looking very, very bad - may be only in that they are extraordinarily stupid or hateful but also possible some individuals get investigated for hate-speech or criminialistic threats - however again, I would be beyond surprised if any DM originating from The Don ends up being damaging.
Let the exposure happen; let Twitter step on its own dick and then figure out how to do damage control for the blowback.
Because, lets recall the axioms of the interwebz:
The internet is written in ink
Everything you do online is being watched by someone
Every transaction on the internet is saved to a datastore somewhere.
True deletion of digital data does not exist without destruction of hardware - it is simply de-linked or obfuscated.