Asking Crusher to erase the Mintakan memories in "Who Watches the Watchers?(TNG)" and hide the Federation's presence on their planet was kinda abhorrent to watch even as a kid. I get why Picard wanted to do it but damn, the coldness with which he sought to erase their memory engrams against their will was just classic early TNG Picard returning with force to show why he could sometimes be an unpleasant and dispassionate commanding officer.