OK, how annoying are CAPTCHAs? If you do not know what the heck I am talking about, CAPTCHAs are those words you need to write on sites like Facebook and recently LinkedIn in order to prove you are human. You know the ones that you can rarely read yourself? Yes, they are annoying and have become quite a burden on the heavy Web surfer, but truth be told, filling out a word or two is a whole lot better than spammers taking over the Web.