WikiFur:Protected page guidelines
If you can edit a protected page, chances are you know how - just bear in mind the reason it was protected. Maybe that reason is still relevant, or maybe it isn't (in which case everyone should be allowed to edit it).
If the page was protected due to a difference in opinon, try to ensure that your edit does not cause undue support for one opinion over another. Still, sometimes it really is just one or two people against many, in which case you may have to implement the views of others while doing what you can to represent the views of the few.
Ultimately, remember that protected pages happen when the community has failed to solve a problem, be it persistent vandalism, spamming, or edit warring. Some of these problems are insoluble and can only be resolved with blocking, but if there is a better solution, try to find it before (or after) protecting a page.