I remember seeing this on LoL Reddit In October.
It even had a rioter inside the post, so they have been aware of this.
http://www.reddit.com/r/leagueoflegends/comments/2kgsmo/cheating_with_zombie_brand/
For those that can't access reddit:
OP:
Hi reddit community, im not a very frequent poster nor do i try to look like a professional at this so im going to say this in as little words as possible.
Cheating with zombie brand is possible
"How?" You ask. Well when zombie brand is within a certain distance of someone and he is facing them his walking animation changes to a zombie(ish) arm flail.
As i was walking towards a bush i noticed my walking animation change and as i suspected, when i warded the jungler was just sitting there in the bush. Im not sure if this is one of the many (many many many many) Glitches or bugs out right now but it seems a little unfair to me that a skin can be such a game changer (Because this skin has saved my ass from a few ganks) And i do not feel this is fair to most players.
So rito nerf plz.
RiotKateyKahos 1 month ago: Thanks for the heads up! We'll look into this!