If you're in my line of work you deal with a lot of people at geographically disparate locations and on the phone. Sometimes you're on calls with these people numerous times a week and sending emails back and forth. Sometimes you get rather friendly with them (especially if they're your customer and you're sort of obligated to be nice and polite).
Sometimes I get an overly friendly note in response that if taken on its own sure it makes it look like we are pals. But these people haven't even seen me! It's sort of amusing to think how friendly you can get before you see a person. I'm always a little taken aback. It's like hey I could be Jabba the Hutt for all you know. And I don't just mean large with a penchant for eating live food, but also diabolical and vengeful as well. I'm just sayin'.
Awesome Jabba the Hutt birthday cake courtesy here.