Is Pakistan bluffing, let's see

So Pakistan Prime Minister Yousuf Raza said earlier that future US strikes in Pakistan would be met with "full force". Is Pakistan bluffing? Are they just saying this to distance themselves from US, as it seems they are in the Osama bin Laden's killing hoax..

Now we will hold Mr. Yousuf Raza to his word:

"A non-UN sanctioned US drone attack has killed at least five people and wounded several others in Pakistan's troubled northwest tribal belt belt."

Source

More lies, or something serious is about to happen? Can Pakistan take on these drones? Or are they just trying to distance themselves from US.

Pakistan was hosting these drones since 9/11, these drones have been parking within Pakistani military airport for a long time.

Here is the pictures:

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But recently Pakistan closed this airport banning US drones operating from within Pakistan killing Pakistanis, while Pakistan was crying foul in each instance. I still don't get it, but at least it is shut now, but who knows, Pakistan might have given them a better airport in response to the billions of dollars of bribes they get yearly from US.

"Pakistan has stopped all U.S. operations from the Shamsi Air Base in Balochistan, an airport which was given to American forces for use after 9/11 and drone attacks were launched from the base on targets in the tribal areas, military sources have confirmed."

Source

UPDATE
Pakistan has went one step further and the Pakistan parliament has passed a resolution saying:

Describing the continued drone strikes as "unacceptable'', parliament said in a resolution: "Such drone attacks must be stopped forthwith, failing which the government will be constrained to consider taking (the) necessary steps, including withdrawal of (the) transit facility allowed to NATO.''

Source

Note - Pakistan is saying if the drones attacks don't stop, the NATO won't be allowed to use Pakistani facilities used in the Afghan war by NATO.

We will see whether Pakistan is bluffing again, we will call Pakistan on this if Pakistan does not block NATO from using its facilities incase of another attack.

ANOTHER BLUFF? - The news came out on May 14, 2011, we will see what happens in case of another drone attack, after the date of May 14, 2011.