Poker theory: completely blind strategy

[thechainsaw]

Hi All - I'm new to this forum, so i hope i am not broaching a topic that has already been raised:

Is it a legitimate tactic in poker to bet without seeing your cards?

I will elaborate, for example in texas holdem, is it legitimate to bet
A) without looking at your cards
B) to do this in such a way that your opponents are aware of this

How can this tactic be succesffully employed. What implications does this have on theoretical poker?

I will post my thoughts if anyone has interest, because i believe there is a successful possible game theory tactic using the above conditions, along the lines of successful new strategies in the prisoner's dilema game.