Shambler created a little program which changes the package- and the mutator-name. You can rename the screenshot sender to something unsuspicious like "SuperCoolWeapon_v1a" so that cheaters are not warned when they download the package (although they might not join if they are warned beforehand).
If you renamed the package, you need to change the configuration-headers, of course.
Shambler's Screenshot Sender Beta 1 Renamer Download