LOL did you even listen to the segment? This isn't advice he's giving them this is him mocking what Hillary Clinton's team did.
Given that there is no legitimate comparison to what Clinton did this just makes you look dumber than Hannity. He did this twice and the jury's out on whether or not he's encouraging witnesses and targets to not cooperate with Mueller (he is).
"One day, we shall die. All the other days, we shall live."