Periodically I clean out my cookies, but there are some I keep including the ones installed from this site. If I delete the PCA cookies, then I have go through the log in procedure !
One day last week when I 'logged in' I received a message asking if I wanted to load an index, plus a warning from my Firewall about it. So I declined. I now find the following cookie installed - pcadviser.uk.smarttargetting.c..
This is an additional PCA cookie, and I think it has something to do with the 'index' request.
I hope I am not becoming paranoid, but possibly someone may enlighten me.