How Not to Use Twitter for PR

Had this conversation today (it started yesterday, but the first response was today... timely!):
This is how you don't use Twitter to talk to your customers or possible customers. Just sayin'.

Also, was there any slander in there on my part? I don't think so. Was just reporting the facts as I witnessed the driver smoking while they drove the food truck by my office. And for the record, I love the food truck concept. I support them.