There have been multiple Hall of Fame MLB Pitchers who used those type of strategies to make a good career. This would be called deception. Two that come to my mind immediately would be Luis Tiant and Juan Marichal. There are many others. IMHO, the name of the game is to get outs. How that happens does not matter.
Bill
You are right, getting outs is the key. You named two very good pitchers that did some extra things. They were in the minority by a long shot. Teaching kids how to pitch and showing them all kinds of "tricks" is doing a disservice to them, when we all know the best generally don't do it.