Scripts vs Server

[vanc]

I'm very new to the world of websites and programming them, and BlueVoda looks and feels great even for a novice. I've come across some 3rd party scripts that claim they can do certain tasks. Some are free, some cost some $bucks!. Do you guys have to screen scripts or modules before I can use them on your server? If so, is there a way to test them before I buy them? What are the limitation or constraints? Where do you put them? on the client or server or both? Help! and thanks.

[VodaHost]

Scripts reside on the server. Within seconds of you installing a script on the
server we will know about it. If we think its malicious you will be "Requested" to
remove it immediatley. If you do not comply, you will be deactivated.

Please DO NOT install any mass mailing scripts on the server. Its up to you
to vet your scripts before you buy them.