Consider this: The Adobe Flash installer has a EULA that is 3500 words long. Adobe claims that the software is downloaded eight million times a day. If each person takes 10 minutes to read (and understand!) the entire text, they would consume over 1,522 years in just one day. If we put that into man-hours: an 8hr day, 240 working days in a year, that becomes 6944 years in a day. Turn that into a 50-year working life and that's 138 lifetimes a day!
This article at The Register deconstructs the text that we all blindly agree to by clicking the "I have read and understood the..." checkbox.