I've been know to buy 300 bottles of $1 wine.
I absolutely despise the data mining effort that most retailers try to force on you during checkout. When I go to buy something and they start asking for information I simply tell them "No Thanks" and most of the time that works. When they don't accept that answer and push for my information I tell them that as soon as they give me their personal information I will give them mine. That usually results in an interesting interaction that goes like this....."I am sorry sir, but I need ABC123 info to complete the sale"..... Then I say "Ok, give me your personal information first". The clerk usually says "Why would I give you MY information?".... Then I say "Why do you feel it not appropriate to give your personal information to a stranger when you are asking me to do the same thing?". At that point 99% of the time they skip the info gathering portion of the sale and get it done with. I have had to stop the sale, return the merchandise and leave empty handed a couple of times.
What do you mean by you people?
"There are no finger prints under water."
People get worried about this but sign up for apps that track how many steps you take, you input what you eat, how much you exercise, etc. All that stuff is being logged. Let alone all the stuff you "like" on Facebook or any other link you click on. It's nearly impossible to not be added to lists these days.