This post is one of those "my own opinion" pieces. There is no sin involved with those people who disagree with me and I'm in no way proposing that the church has any agreement with this post.
But, I'm one of those people that sends a request to credit card soliciters that they stop doing it. I use their own "no postage necessary" envelopes when I do so by circiling my name and saying something like, "Please do not contact me as I have no desire to use your credit card." Sometimes they will send a second time and I will write, "Second Time" and repeat the above or a variation with a more direct message (something along the lines of "cease and desist").
I think the all of the credit card companies have figured out that they are annoying me not making any positive impression...all except American Express. I have asked them three times before to cease and desist but they continue to waste paper and IGNORE what I have to say. So, here's my request. There are tons of good credit cards out there that listen to people. They solicit but they don't waste all kinds of money and paper when people make it quite clear that they don't want their product. If you have an American Express, your card does this. So, why do you want to use it? I think it's time to destroy our American Express cards and let them know that we are doing so because of unethical solicitation practices.