It doesn't bother me.Life is too short to worry about what someone else is doing right or wrong in your eyes.I get a kick out of the Wal Mart crowd the night before season though.
Besides,you have no idea if he is breaking any laws.He may be using it in another state or like mentioned above,in his back yard.
As far as buying a bow a couple days before season.I wouldn't be worried about doing that myself so it is quite possible he knows what he is doing OR is getting it for a back up because he got a good deal.