How to leave a bad impression

It seems lots of people and companies out there are trying hard to leave a bad impression.  If you want to join their ranks, here are a few tips:

• Don’t respond to inquiries. If someone calls or emails, free free to ignore.
• Don’t say thank you. If someone buys a product from you or gives you a contact or anything, don’t bother saying thank you. That would be nice.
• Keep pounding away with the same message. Send the same offer over and over, a couple of times of day if possible.
• Solicit free advice. Ask around for all the free advice you can. After all, it’s just advice, right?
• After you get your free advice, feel free to ignore it. Someone’s an expert but that doesn’t mean he/she knows what she/he is saying.
• Cancel or change plans at the last minute. Your time is more valuable than anybody else’s.
• Use foul language. If you are on Twitter, go ahead, drop an f-bomb or two.
• Be crass, self-involved, self-promoting. It’s all about you.

My question is: how hard are you trying to leave a bad impression?