A little bit of paranoia is healthy, keeps you on your toes and considering all the vectors. It's when you get too comfortable you fuck up and get caught. If you are worried about your forum persona stick to the following rules: Never disclose any identifiable information about yourself, location etc Never disclose or discuss your purchase activity too specifically e.g. name of vendor, quantity and date of order Stick to that whilst throwing in the occasional red herring and you should be fine.