How is this any scarier than running Microsoft Security Essentials and other removal tools like Spybot? At some point there has to be trust. Trust that the tool

How is this any scarier than running Microsoft Security Essentials and other removal tools like Spybot? At some point there has to be trust. Trust that the tool which is controlled by another party that it will do only what it's supposed to do. If someone don't trust anyone, then that person shouldn't even have their computer connected to the Internet so complaining about it is moot. I trust Valve. They've given me no reason yet that they aren't trustworthy. They have to go after cheaters because hacks and cheats ruin online games so quickly. So it's damned if you do/don't in many ways.