Flashing advertisements! ?

I have adblock set up on my mac, and i do not need an account which is paid for. unfortunately it does not seem to block all ads. i was therefore wondering that if there was anyway of stopping flashing advertisements on yahoo mail, and other sites for that matter. i have no problem with regular ads, and understand that they are there to fund websites and mail accounts, however the flashing ones are a health hazard. i suffer from vertigo which has similar triggers to epilepsy. this morning i logged on to my email, only to be greeted by a flashing bingo add. the add filled 1/4 of the screen and i am still feeling sick and dizzy as a result of the flashing. there are other illnesses that are affected by this flashing, such as epilepsy which i mentioned above and migrane. films and tv shows are required to give prior warning to strobe lighting effects and also the spinning shots now come with a vertigo warning, e.g. the last jb film. should websites/adds do the same?
Answer
If you install a program such as peerguardian, it will let you right-click on any adverts and block that ip address, this will mean that any ads hosted on that server will be blocked from your computer, whatever website you go to. very handy indeed.