Saving facebook id as int or varchar?

Question

My question is more advisory than technical. I\'m writing a Facebook app in which I am fetching some information about the user, including facebook_id.
I was wondering i

Answer 1

For new data types, as they are grahp obj ID, I believe it is safe to save them as BINT. However, for old "id", e.g. pic, save them as string (you can easily see that they are in the format xxxxxx_xxxxxxxx)