There is a small chance that human tracking will be able to pick you up. Also if the enemy is a detector then most likely he already have you on track.
Also without any cheat/hack/bug/exploit, if I have you on tracking you better animal form and forget about hiding and run away in straight line. Because my meteor swarm/chain lighting will be hitting you every single time and you can be stealthed all you want.
Not everything peope do to you in pvp to defeat you is an exploit. Oh and this doesnt need fixing, stealthers + smoke bomb + animal form is already oh easy mode. If you played a ninja stealther right you should never be killed in small scale pvp, unless one of your enemies is a detect tracker. And if thats the case... you can animal form away, hit a server line to make him lose queue on you or simply recall or scared journey. Its really not that hard.