possibility to pre-moderate uploaded photos

Hi,

is there an option i can set or something so that any photo uploaded must be pre-approved by the admin for it to be available.

I have some malicious users that upload images with content that is not allowed in the site. This generates a negative response from other users. So I need to approve images before they are published.

If there is not a functionality like this. do you know of any other plugin that does that?

Finally, in the case i add that functionality myself on the plugin, any recommendations / tips / hints ?

 Thanks.