Pyzon...you aren't the only one that feels this way. I try to be courteous to my neighbors and young kids, but door to door salesmen, and others are not welcome. You just can't trust people these days, my neighborhood(the one I grew up in) has slowly been having more and more small crimes. My girlfriend won't even answer the door if she is home alone and I applaud her for it.
You can also call me an ass...won't be the first time.