These have been explained to great length in Alec Chang's post, so I won't go into them here. If you know that you have no intercept to speak of, then don't even attempt to block. Pretty soon those bleeds for 7 that you're so afraid of become bleeds for 1 or 2, as they plead with you to block and get one of the 7 stealth cards out of their hand. There is no doubt that these strategies are effective. Rush is particularly nasty.
Bounce is almost the canonical anti-bleed strategy.
Blood Gain and Race are the champions of Don't Block. These decks are so concerned with killing their prey or gaining tons of pool that they completely ignore their predator. Well, in that case, the deck will not be well designed . A deck which has a way to deal with many different strategies is versatile , and thus a good deck.