what is this problem?

[Rahul]

I cannot read any comments made by my friend on Facebook. Neither any post he is tagged in. Whenever I search his name and visit his profile, it says 'no contents available'. Rarely I can access his profile. I even searched his name by my friend's account but it was not there in the search box. Yesterday he liked a page and it was on my news feed so I visited his profile. He hasn't posted anything new or added any pictures. Only he was tagged in a status on which he had commented which I could not see earlier.After that I searched his name, it was there but after 10 mins when I visited his profile, again it said 'no contents available'. Now that I am searching his name, it isn't there. This is happening quite frequently. Does he deactivate his account frequently or has he restricted me? Please help me. I will surely rate the answers and give points.