From what I understand, live oaks are able to withstand more abuse than normal. This does not mean that they are indestructible, but there could still, possibly, be hope. It is my wish that someone more knowledgeable about this kind of thing, possibly Howard, might chime in with some expertise.
If you do not get an answer here, go to the "Trees" forum and repeat the query there.
I appreciate your concern. Trees are very important to the quality of all life on earth! I think that most people do not realize this. It is a shame that they do not. It is our duty to enlighten the world: not by humiliation and degradation, but by offering them a more practical and successful way of doing things!