I actually think the ads on Facebook are done in a transparent and un-annoying way. Unfortunately, they only show me two things:<p>1. Geeky shirts with &quot;clever&quot; sayings on them (since they know I&#x27;m a programmer, I guess).<p>2. Things I&#x27;ve already recently bought on Amazon (or elsewhere).<p>In the first case, what they know about me leads to a severely mistaken impression regarding something else about me. In the second case, what they know about me is already outdated.