[ChuckElias]

Sure, you're allowed to call an intentional or flagrant on any type of play. But, in my experience, I've never seen an intentional foul on a screen. I think it would have to be so obvious, like throwing an elbow instead of a shoulder, before I'd consider an intentional. Or else maybe if the screener had his arms crossed and then raised them, pushing his forearms into the defender's throat. Something like that might get me to think about an intentional.

But lowering the shoulder, while obviously a foul, doesn't seem to be a "hard foul" or flagrant.

What makes you ask this? Did you see a play that made you think it might be intentional? If so, I'd be interested in the details.