If you're asking if they can edit it themselves, they can if you set it to Edit and Play (though there are ways to probably crack th coding and do it otherwise).

Sure.. I don't think it's much of a worry, I don't use any original coding of my own. Any scripts I use are freely available to use and I would be more then helpful to assist someone if they are unsure of how I did something, It'll be fun trying it out on the Workshop and seeing the results!