As Serene Grace said, it could end up getting messy within our post bit and we would end up running out of room. However, if you really feel the necessity for the information to appear with every post, my recommendation to you would be to attach the details within your signature so long as it corresponds with the signature rules. The alternative, which Serene mentioned would be to put it in the "About Me" tab in your profile.
But in my opinion our post bit's don't need to be more cluttered than they already are, I think it can end up looking messy and unappealing. Though not a bad idea, I would advise you to take heed of aforementioned suggestions.