Tip share is bogus. It only serves to allow employers to pay busboys and cooks less money. Those folks are not on the 2'13 per hour scale and the tips I have always left were for the WAITRESS/WAITER for their service. I have stopped tipping alltogether due to tipshare.
If I think my booth is very clean and I want to tip the busboy I will. If I want to tip the cooks I will. To me, those services are part the bill I pay for the meal. A curteous waitress that never lets my drink glass go empty is worth a tip. But she aint going to get one from me when I know that her employer is going to take that tip and split it up with other folks that did not intend to tip at all.
Tip share is a form of socialism in that a work group will all get equal share of tips made, so then while a waitress busts her a$$ and the busboy slacks off(or the other way around) the each get the same cut. Pi$$ on that noise.
This is an artificial construct. You consider a table cleaned, and cleaned in a swift manner so you don't have to wait to be "part of the bill," yet you don't consider bringing the food to the table and keeping your whistle wet "part of the bill"? Is there some rational reason for that?
If busboys, hostesses and waitresses, along with cooks, all together make your experience a good one, why does it bother you if they all share in your gratuity? How can you logically single out the waitress?