I think just visiting certain webpages can do it , but i think you may have to download something from the page to get it into your system but im not sure if you can get then by just clicking something simple like "CLICK HERE TO MAKE THIS YOUR HOMEPAGE ECT" but someone else here might know alittle more about how easy or hard it is to avoid getting it on your system
(hide) If you want to save on bandwidth you can reduce the amount of information that shows up in your pages in the Settings. Try changing the number of games in the main page and the number of messages per page. (pauloaguia) (show all tips)