Will someone know if I use Find My iPhone to track? - 1

My friend is using my itunes and every time I try to delete her device from Find My iPhone, it comes back. Sometimes I accidentally click on her phone, unintentionally, will she know?

Yes
"The whole World's watching"

Unless you sent notifications to her phone via Find my iPhone, cause the sound to go off or lock it, then no.

◔◡◔ nope