Would you be upset, should I be?

After I responded to a want add, a "scooper" messaged me and I stated working the deal/shipping to his zip, etc.. ( I was low on coffee intake I guess ). Later on I realized I was replying to the WRONG DANG MEMBER. Just another added to my ignore list.
I use that option as well. I have a bad memory, and if someone pisses me off today, I don't want to forget later on and deal with or converse with in the future because I forgot. I have 20 on that list going back many years.