Donking chips for table image is a tough way to do it. One who strongly ascribes to it is Mike Caro. He states that when he sits down, his goal is to lose 1,000 dollars in 30 minutes. He then sits back and collects all night.
On a side note, in rebuy tournaments if you feel you are better than everyone at your table, and your table won't break up soon. Donk chips into the game, and rebuy a bunch of times. Now, your table has many times more money on it than the others. Now you get all the chips back. When your table breaks you go to the next or final table with a huge chip stack. One that you artificially built by buying in 39999 times.
Daniel Negreanu did this, he holds the record for rebuys. He bought in so many times, that he had to come in second place to break even... He won the tournament making a small profit! lol.
Bill