I was reading a "news" post that stated that no respectable web agency would use open source CMS's because "they can be hacked easily, and thus aren't safe", that got me mad, so i replied defending CMS's and got greeted with the moderator stating that he dares me to name a few "Big consolidated web design companies that use open source CMS", and that's what i intend doing.
Original post (in spanish) on:[http://www.cerotec.net/NOTICIAS-DISENO/Páginas-web-prefabricadas/14/]