Some of you guys are living in a world of dreams. Warm up period is just that. A player can use what ever the rules say is legal to use during the period. For some, it may be better if no warm up shots are thrown by any person. Does that mean that everyone should refrain from bowling during warm up for fear that he is going to blow the person's line.
Who is to say how one can approach the lanes during warm up, in an effort to break them down. These guys are professionals. At their level, they should be able to adapt if they expect to win. If one pro gets an edge by moving the oil around during practice by use of a legal ball, so be it. Otherwise, set rules that dictate how many balls one can throw during practice, what the ball surface has to be, and then limit the number of throws across each arrow. Please. Get a life.
And no, it is not a moral or ethical issue. It is called legal competition. If you are so feeble minded to you believe that what your opponent throws during warm up is going to negate your chances of winning, you need to find another game to play. Read the lanes, figure out the adjustment, pull your skirt back down, and bowl-------SISSSSY!!!!!!!!!!!!!!!!!!!!
Those that can do. Those that can't complain. Pimpin ain't easy, but it's mandatory.
Most things we like, we don't need. Most things we need, we don't like. Don't confuse your likes with your needs.