This excerpt taken from the HSY DEF 14A filed Mar 16, 2009.
What will happen if I do not provide my proxy or vote my shares in person at the annual meeting?
If you are a registered stockholder, your shares will not be voted.
If your shares are held in street name, your broker, bank or other holder of record might be authorized to vote your shares on certain routine matters. The election of directors and the ratification of independent auditors are currently considered to be routine matters. On these matters, your broker or nominee can:
Non-routine matters cannot be voted without your instructions. When a broker or nominee is unable to vote shares for this reason, it is called a broker non-vote. We are not aware of any non-routine matters that will be brought before the stockholders for a vote at the annual meeting.