I work in a department of about thirty people. In the past few months, we have been asked to contribute money to buy gifts for co-workers -- for engagements, baby showers, bereavement flowers, and Christmas gifts for the department chair, administrative assistants, housekeeping staff, and lab manager. Generally these requests are made by e-mail, and I can see from the “reply all” messages that everyone else contributes. Often these donations add up to a large amount ($10-20 each time). I do not wish to take part, but am worried that since I am a newer employee my lack of participation will be interpreted negatively. What can I do?