Whilst I am all for parents ensuring minors do not have access to adult media, I find it strange that you chose to have an affiliate link to Sentry PC. Your visits are going to come from the Link Lists, which means the user has already had a very good read down that list and selected your site from the raunchy description. If they are a minor visitng then they shouldn't be on your site and they are hardly going to call their parents in to come and buy the software? If they are an adult surfer Sentry PC is surely the last thing on their mind??
Personally I would rather use the link on something adult related and if you feel strongly about minor's having access register your site with
http://www.rtalabel.org/