Please look at the first two functions (wpcp_activate and wpcp_deactivate) of this plugin. You will see that it forces an email to the developer with your website address when you activate it and deactivate it. This is WITHOUT YOUR PERMISSION.
It also has a function (wpcp_credit) that adds a link in the footer to the following website: http://pretty-pictures-ar.blogspot.com/2013/07/beautiful-child-photos.html.
If that isn't creepy enough, the footer information with that link is coded to be hidden when you are logged into your wordpress website. It only shows up when you are not. WITHOUT YOUR PERMISSION!
JUST DON'T DO IT.
There are others available on here. Pick a different one.