Ethical or Non Ethical

I think it  is non ethical because it is his business. And nobody has to inter fear with nobody's     

business. So i think this is wrong anyway I think that Lester should of asked permission to do a party at the first place but that is a whole different story. I think that they should of not checked his message if they would of gotten  mad at him they should let the parents do that. They should know that his kid was going to throw a party with out their permission. So I think is unethical.