BasYisroel, that is a little bit of an overreaction, don’t you think? First of all, a wig is not holy, by any stretch of imagination, certainly not any holier than a hat, or a tichel, or snood. If I drop it on the ground, I won’t kiss it when I pick it up. A frum married woman WEARING a wig, is BEHAVING with kedusha, and therein lies a big difference.
The “everyone” who was shocked, need to take a chill pill. Not everything is meant to be offensive to your sensibilities, and not everything is disrespectful.
While I personally do not see the point in calling it “edible” (except, as was pointed out, we sometimes say someone is so beautiful or adorable, i.e. our aineklach, that they look delicious or “good enough to eat”), I guess the person who wrote the ad copy was trying to convey that the wig is really, really gorgeous.
Now I have to go cough up a hairball.