No people can not tell that who had copy
pictures. there is no tracking device or any software through which you can track the person that had viewed your facebook
profile. people make fake ids on facebook
and they have habit of viewing others profile pictures and other things like friends list, post etc. but facebook
offers a privacy option that till now any other web site offers. its privacy setting . just log on to your facebook
id and then go to the account then in privacy setting . in privacy setting you can just manage that who are allowed to view your profile pic,friends etc. and who are not allowed. evenly you can restrict all of the friends and others peoples on facebook to not view your facebook profile
. from this you data/information is saved from all over. i hope this help you a lot.