People sign contracts all the time. Credit cards, mortgages, employment contracts, privacy agreements, non-disclosure agreements, rental agreements, car rentals, etc. Few, if any, actually take the time to read them. I’m one of the few. I read everything.
Because I don’t ever want to get screwed by the terms of an agreement that favor the other party.
Looks like some employees over at Skype didn’t bother to read their stock options agreements. The options they thought were worth thousands or millions are now worthless. Had they read the agreements, they wouldn’t have been fooled. They probably would have gone someplace where their options had value, or they would have had the contract changed.