Here's some definitions that might help:
1) Bounce - Attacking with an altitude advantage a plane that is not already engaged with another.
2) Cherry Pick - Attacking an enemy who is already engaged with another.
3) Clearing Your Wingman's 6 - Attacking an enemy who is already engaged with another.
4) Drag n' Bag - Tactic whereby a friendly drags 1 or several enemy laterally for a friendly to destroy while they are "engaged" with him.
5) Vertical Drag n' Bag (aka Rope) - Tactic whereby a friendly pulls 1 or more enemy up vertically to slow them down, hanging them there for a friendly to destroy while they are "engaged" with him.
6)Cross Drag - Tactic whereby a friendly with a single pursuer turns him perpendicular to your flight path to allow you to close more quickly and provide a higher profile shot on the enemy "engaged" with him.
So, #1 is not a cherry pick, that's a pure BnZ in the classic sense. Some seem to think if they get bushwhacked and didn't see it coming that's a cherry-pick but it's not. If they were not otherwise engaged it's just getting bounced.
That leaves #2-6, all cherry-picks or variations thereof. Coincidentally, they are all fundamental tactics of air combat and cooperative wingman tactics. There's hardly more fun to be had in the game than flying in a complex engagement with some folks that can recognize, execute and exploit #3-6. In fact, there's a name for those that can't recognize, execute and exploit #3-6, "clueless noobs". Personally, I don't care to fly with people who consider themsleves above cherry-picking, because in a complex engagement people averse to setting people up, recognizing setups, exploiting setups and clearing your 6 are not worth a pinch of owl poop.