No!
However, in some few cases the FA has put it high up in order to make an artificial 'chipped' catch to the anchor. Kind of stupid, but these endings exist.
Check the article Practice & Ethics http://web.8a.nu/articles/ShowArticle.aspx?ArticleId=981
This is what I thought about it.
I Know some routes in which the crux is to clip the top biner. Not very nice route setting, but that's it.
In one of these routes I saw a guy grabbing the top chain, clipping the top and then yelling: "First 7a onsight!". Grabbing the top chain seemeed to be a group custom: the buddies of this guy did it in other routes.
I wonder how many people (or climbing comunities) do that and report their tries as succesful climbs.
i really think it depends on the route and the crag. some routes are made to grab the anchor, and some crags it is totally fine as in everyone does it.
basically, whatever makes you sleep at night, dont worry about what other people say.
grabbing any part of gear/anchor/chains/draw/bolt is NOT a redpoint/flash/send or any sort of free climbing, it is AID climbing !
never, ever will it be an ethical send if you pull on any type of gear.
Grabbing the top chain