Unless you have a friend who can protect you (meaning you will both get the benefit of more scrolls), you are as well accepting it if someone offers. Can't do any harm and best case scenario, someone is watching your back because they want to increase their own scroll count.
I remember the first time I was offered protection at a champ and had no idea whether to take it or not. Given that it was fel, I was automatically suspicious that someone was trying to screw me over.