Dear Google, While I am impressed with the ease and speed the web market can install an application on my phone (it seems to trigger basically instantaneously)

Dear Google, While I am impressed with the ease and speed the web market can install an application on my phone (it seems to trigger basically instantaneously), I was very dismayed at the security implications of this functionality. This example is only one of a myriad of reasons I'd rather not have it enabled. Please allow me to disable this functionality on the device itself (and not just as an option accessible to my account on the web).