What is the meanest thing someone has done to you, how did you deal with it?

Probably when I was pregnant and my OBGYN's nurse was beyond rude to me from the beginning. Everytime I went in she ignored pretty much everything I said, got mad at me for not answering her calls (despite the fact I told her repeatedly I have a job and to call at a different time of day), and when I did answer my phone she'd forget that we'd even talked. I considered switching doctors because of her but I had already had the invasive first exam and I didn't want to go through that again. I kick myself everyday for not changing though, my daughter came out very sick and it was due to my crappy prenatal care.