Can Facebook blocks you from stalking someone too much?

[CLa001]

So lately, I haven't be able to go to my Ex page because his name has disappeared in the search bar (we aren't friends on Facebook). I thought he blocks me, but when I go into my message history his name still shows up normal, not black. I clicked his name and got to his page. So basically, I can't go to his page by searching his name, because it wasn't show, but I can by go into message history of us and click his name.
Does that mean Facebook blocked me from stalking him?

[Daniel]

he probably deleted it, and also facebook can do whatever they want. I am still friends with my ex on facebook, but none of her news shows up on my wall

[Matt]

The same thing happened to me. Not sure