The Adobe Flash Player has a quite restrictive EULA but it is not presented to the user when he installs it. Isn't the user obliged to accept it, before using it? Maybe some users would refuse using it, if they knew the rules they accept by installing the Flash Player? (I think same problem applies to many software from partner repository, restricted drivers and proprietary or non-free software.)
SnapOverflow
It is implied You have accepted the EULA by installing the flash plugin from the software center.
You are shown this warning in the software center.