Got a bit of a debate going on in my current league about the wonderful

Now, I jumped on here when we had the discussion, and after looking through about 4-5 pages of this particular forum, I couldn't find my answer. So, I've decided to put (hopefully) all of the extenuating circumstances surrounding Pass Block into 1 easy-to-find thread.
Pass Block Use 1:
Obviously yes, as this is what the skill was intended to do.When your opponent declares a Pass action during his turn
Pass Block Use 2:
The thread I found for this one is here, and I believe the consensus is that you can.You block/blitz an opposing player who has the Dump Off skill, and want to block the pass
Pass Block Use 3:
This is the debate topic of our little group. I've been told that I can't PB it (I'm the only one in the league that has PB), and I could've done it on 2 occaisions now; 1 of which I know would've at least sucked a RR, and possibly even given me that game. I can't find an answer on the forum, so I've decided to put the question out there.Your opponent declares a Hand Off during their turn
Oh yeah, 1 or 2 of the guys are saying that the opinions of people on these forums may/should not really be taken as gospel regarding BB, so if a BBRC member or 2 could drop in with an opinion, one way or the other, it would be appreciated. Also, if anyone else can come up with situations where Pass Block might be used, let me/us know.
Thnx in advance guys.
PS: I thik PB can be used in all 3 situations, as a Hand Off is described as "...a type of very short pass..."
PPS: If something doesn't work (the thread title, the URL, or something else), let me know why, as this is the first thread I've started.