Samsung are big offenders for this, putting the Peel TV remote on their phones, which can't be uninstalled. Recently, the app was updated to put advertisements on your phone's homescreen. Completely unacceptable
With the whole poor security of the SmartThings stuff, I have serious doubts about Samsung's ability in software. Their online services were dire, no SSO so I had to frequently re-login when I moved to a different part of portal, errors here and there.