if you are going to pakistan yes the govt agencies may suspect you and watch you. if you are going for studying only this shouldn't be much of a problem. if someone is going to join the J!had and study then that can be arranged in both cities under pakistan govt (like khi, lahore etc) and cities and areas where fighting occurs such as dar ul uloom haqqania. these people are students+mujahids. you have nothing to fear from the taliban. the spies have everything to fear from them.