Range Attack Collision Mechanic: Players can hit other players for damage
 

I thew a javelin at a dragon and between us was a sneak/hide rogue. The javelin hit the player for damage and broke sneak/hide.

Don't know if it was intended to register the damage against a player but definitely a good way to grief low level toons! (Snackon was in his 40s and the toon throwing the javelin was a 60 MNK)

Targeted was Esorpa of the Ring (WW Dragon):
[Sun Mar 01 16:56:45 2015] You try to hit Snackon, but miss!
[Sun Mar 01 16:56:53 2015] You try to hit Snackon, but miss!
[Sun Mar 01 16:56:57 2015] You try to hit Snackon, but miss!
[Sun Mar 01 16:57:02 2015] You try to hit Snackon, but miss!
[Sun Mar 01 16:57:05 2015] You hit Snackon for 14 points of damage.
[Sun Mar 01 16:57:43 2015] Esorpa of the Ring claws Snackon for 219 points of damage.
[Sun Mar 01 16:57:43 2015] Esorpa of the Ring claws Snackon for 219 points of damage.
[Sun Mar 01 16:57:45 2015] Esorpa of the Ring claws Snackon for 152 points of damage.
[Sun Mar 01 16:57:45 2015] Esorpa of the Ring claws Snackon for 219 points of damage.

Thats how it worked on PvP servers