Hardly anybody likes ads, but I’m confident that most people understand the important role advertising plays in keeping free content free. It’s privacy and security concerns, as well as abuse by sites that are all but unusable due to ads that pop up every time the cursor is moved, that drive users to block ads en masse instead of using ad blocking software as a tool to remove ads from sites that either overuse advertising or display ads from questionable sources, which can be a security concern.