Yes i am.

But there is always tons of elite mobs with million miles of detection range.

The only way to get behind those gates is if an enemy force has taken the nearby keep, and then you have to follow the zerg in to get the Scroll. Theoretically you could even do it if the other enemy alliance is doing the attack, you just have to stay out of sight and go through the gate after they've already cleared out the NPCs. But many of their players will also be going after those skyshards, so you'll have to get behind the gate and get out of the way of the other faction's pillaging. So yeah, its way easier if its your own faction on the offensive.

Ltownatrain wrote: »

You actually don't need to follow in other players to do it. I grabbed all four behind enemy lines one day on scourge (when it was still in AD's favor) and all I did was stealthed until the npcs at the gate saw me then sprinted like a bat out of hell until I was out of range of them. After that I just went back into stealth (sneak) and grabbed the skyshards.

Ehm what ? Those gates are CLOSED. One canot simply walk into enemy territory.
I belive that some alliance have to destroy nearby keep first.

You can get them but the keep protecting the gate has to be controlled by an opposing faction. If the npc's are still up you simply sneak up till they see you, when the eye begins to open, then sprint like mad. The other way is to simply sprint up and once they see you hit shadowy disguise, night blade skill, and spam it till you are through. These shards are designed as a side reward to being around when the gate is opened and the scroll can be fought for. The invisible wall is to stop people from getting behind the gate without controlling the keep first. In beta Zergs were jumping over the mountains and bypassing the gate entirely to gain the bonus of the scroll without doing the work.