I'll have to see the Lapierre hit again (can't see youtube at work), but my initial impression was they were very different hits. Lapierre's was DIRECTLY from behind. Ovechkin's was more side-ish and much further away from the boards. Lapierre definitely knew that he was putting Nichol into the boards hard. Ovechkin 'should have' known (but may not have known) that Campbell was unprepared for contact (his right skate wasn't planted), and it was move of a shove than a hit. At any rate, it was dangerous and unnecessary. Should be suspendable imo.