I rarely use Excel since I'm an expert at relational databases, but I'm not keeping any databases regarding the IP activity on the site. The only database that I have is a list of the URLs that I visit which are grouped by state. It makes it easier for me to click that link versus typing out full URLs or repeatedly searching to get to a specific site.
FWIW, I also have e-mail addresses for registered members. An automated e-mail with an activation code is sent to anyone that joins, but I have not contacted anyone using those email addresses with the exception of two members who were already my friends before I created the site. I do not keep any databases with email address information.
On occasion I have sent some messages through the system to the registered users to get the state where they live since I originally tailored the coverage for those members, but I stopped doing that since there are members and guests from around the country who are thankful for the service being provided. I have been cyber-stalked myself, so I place an emphasis on respecting the privacy of others and would never do anything nefarious with the information that is available to me.
I do sense that you are projecting the worst things you can think of onto other people though. Therefore, I'll conclude this response by reminding you that it is your decision as to whether you want to read the content that I'm providing. You are welcome to visit and join the discussion either there or on DU, and if I have anything to add then I'll do so. Have a nice day! 
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