You do not need a Facebook account to view BlueByte's page, it is open to everyone. One click away from the log in page here.
My main point is this was a problem with Ubisoft, it told us so when we tried to unsuccessfully log in. This is a BlueByte forum. Complaining here about a problem with Ubisoft is going to get you nothing as they do not read this. You might as well blame the waiter at Denny's because you do not like the material the seats are made out of. The employees at BlueByte have to log in just like everyone else. If they cannot log in due to a problem with Ubisoft's server... what do you want them to do?
For once... it is not their fault.
Be mad with the proper people please.