So I got a trade, which was pretty fair, but the message that accompanied it was something else...
They said (no lie): "I really don't know what to offer and I'm sorry I'm not as "high rated" as you and that I have "junky" pets (to your eyes), but I just want to tell you that you are WAY TO harsh on your rules. And don't accept if you want but I'm just thinking that why do you care what is trading for what, I mean the pets you put for trade are like all extras! But what ever I would really like the dog because he is in my wishlist, but I'm not sure if my offer is good enough for you so accept or not I just think those are dumb rules."
Hm, nice way to get your wishlist pet, eh? I thought so too, which is why I responded with this:
"I never once said I thought I was better off than you or that your pets are junky so don't jump to conclusion about me and my rules. And frankly, I don't give a heck what you think about my rules. They're mine and I can do as I wish with them. I don't feel I should explain myself to you or come crawling and apologizing just because one person on CS doesn't like how I phrase my rules. So because you were so rude in your message, you can go get your wishlist dog from someone else."
First time someone has ever attacked me about my trading rules.

Note to n00bs: Don't be rude to the person you're hoping to trade with.