A nulled script is if somebody alters a script to eliminate the Protection executed by the author. For example, should they remove predict domiciles or registration checks or etc.,. These scripts are spread by shady/warez websites.
I have no, although nearly Not Possible to find from writer Strategy of these legal implications from removing code at a script, Javascript code has to be accessible to be of any use also can be not compiled. In Terms of licensing Data in one single and eliminating copyrights Script, (also really challenging to detect) that is pretty much prohibited up to I am aware of