To tip, or not to tip? Let's discuss

A series of recent events yesterday, two events actually, prompted me to ponder the following question: when picking up food for takeout from a full-service restaurant, do you leave a tip?

The two events that led me to ponder this question are Frank Bruni's Diner's Journal post on Tipping on Wine and my pickup of dinner last night at a local Italian restaurant. Since the credit card processing is the same for dining in and taking out, the slip has a line for a tip.

When you pickup food at a restaurant for takeout, do you leave a tip? I don't, and here's why. The staff at the restaurant that are responsible for taking the order, preparing the order, and cashing you out when you pick up the order are all making an hourly wage or salary. They are not working for tips like the wait staff are, so therefore I don't leave a tip. I'll add that I am a very generous tipper when dining in, usually leaving 20% unless the service is really awful.

What do you think? Do you tip on takeout orders? Leave a comment and let's discuss.