Why am I blocked from a facebook page?

[Alyssa]

I like this page called Lalaloopsy on Facebook and I looked at one of their posts, but I can only share it! I have not posted anything ugly, like pornography, curse words, or anything to get blocked. So, why am I blocked? I can't message them to ask them why.
I add in that this page lets people post pictures and posts, and they let them comment and like on their posts.

[Love]

Some fan pages can set were no one can post on the wall an stuff like that