I once met a guy who had 2 business cards printed. One was real, and one was for freebie-seekers. When asked for a freebie, he would produce the card with a Salvation Army logo on it and say, "I'm sorry -- I just can't do it, but I believe you can get free stuff here."
I'm an interior designer, commercial design that is (stores, restaurants, showrooms, etc.). Fairly often, someone will try to corner me for advice on their bathroom/kitchen/den/whatever. They usually back off when I seriously suggest dynomite as a renovation tool.
Clients also expect freebies all the time. I've been in Shewolf's situation more times than I care to remember. Like they say, Shewolf, you just have to be firm and fair to yourself, and be prepared to lose a client. (And someday, I'm sure that I'll take my own advice.