Why am I asked to allow non-market apps upon installation of anti-theft?

What is the reason for allowing access to non-market apps for the installation of anti-theft? I am a security conscious person, so things like this do worry me, especially when you hear of the malicious kind of apps lerking around. I wouldn’t want to inadvertently choose one from the app store. Once installed, can I now switch this access off again and still have the anti-theft working properly?

Hello,

we need this setting to install Anti-Theft. We need it distribute costumized packages for the custome name of the app.

However, you can remove the setting after the installation.

Werner