Mike Awesome I believe attacked someone backstage too didn't he?
Indeed he did. Mike Awesome attacked Rhino and won the Hardcore title from him, at MSG. Now THAT is big. A non-contracted WCW wrestler won a championship from a WWF talent at MSG, where WWF ruled the roost.
MSg had pretty much been declared 'WWF Only' so that the other promotions didn't even get a look in, and i remember that when Awesome's hand was raised with the belt, JR was going apeshit about how it had spit in the face of the WWF/MSG tradition.
Unfortuantely, the fans didn't think it was worth getting excited about, probably because it was Mike Awesome of all people that actually did it, and he'd spent several years being made to look like pure shit in WCW, that people didn't remember what he could actually DO, as showcased when he was an ECW guy.
But more stuff than that happened. Before Booker T came along and attacked Austin at KOTR, DDP had been stalking Taker's wife, and Raven appeared and interfered in Tazz's match with the King at a PPV as well. Both of those angles had started BEFORE Booker ran in and attacked Austin.
The ECW side of things was actually handled EXACTLY like the NExus thing several months ago. If i recall, Kane and Jericho were forced to team up against Mike Awesome and Lance Storm (don't quote me on that, but it was definitely two guys who'd started in ECW and moved to WCW). During the match Tommy Dreamer, RVD and several other ECW guys came through the crowd and jumped in the ring and a mass beat down was delivered to JEricho and Kane. Several seconds later, the Dudleys, Rhino and a few other WWF/ECW guys came down as if they were going to make the save, but instead embraced their old ECW bretheryn and helped them beat Jericho and Kane down even further, and THAT's when Paul E. got up and announced that ECW was joining this war, and then at the end of the night, they'd joined up with Shane and Stephanie.
I think the main difference with these two angles, as people have alread said, is that when we heard Invasion by WCW, we all had expectations of what it'd be like. We all assumed that they'd have top tier WCW talent, with the WCW 'management' involved as well, but instead they were left out completely, and all we had were the wrestlers who were A) someone Vince thought he could make money off of, and B) not afriad to have their WCW reputations shit on by having to start again in WWF (Which is the sole reason we never saw Sting in WWF, because he wanted to be recognised as Sting with all his accomplishments and not be verbally shit on by The Rock which is what happened to Booker T).
What's really annoying is that ALL of those guys that previous posters claim they wanted to be involved in that angle, were eventually signed to WWF at some point anyway. The nWo, Goldberg and Mysterio all joined the WWF after the Invasion angle, Sting never did obviously, and there were still more ex-WCW guys to come. Jamie Noble didn't sign with WWF until way after the Invasion angle started, neither did Jimmy Wang Yang or Ultimo Dragon, and these are ALL ex-WCW guys.
But if you look right back, to the very day that Vince bought WCW from Ted Turner, you kinda had an idea of how he was going to treat their talent. Does nobody remember the little skits he had on Raw that night where he'd be watching Nitro in the back, and he'd comment on how he definitely wasn't going to re-hire guys like Goldust and Jeff Jarrett?
I can distinctly remember him doing one on Jarrett in particular where he said something along the lines of 'Jeff J-A-R-R-E-T-T is going to be G-O-N-E!' effectively telling the whole audience, that Jeff Jarrett's career was effectively over in regards to being in a top promotion and being featured on national television.
So personally, i think Vince always intended to do the Invasion angle the way that he did it, using reliable, younger WCW talent that weren't making huge money with WCW, so therefore Vince didn't have to pay them much more anyway, if any more at all, and ECW guys who were thankful just to get a guaranteed monthly pay check. Why re-hire all those fossils that fucked you about previously i.e. Hogan, Outsiders and have to pay them ME wage, when you can exploit the mid card guys who desperately need income for pittance?
We may not have thought the Invasion was well orchestrated, but from a business point of view, Vince probably made the best decision possible. Now you may argue that the revenue from the angle would have made it worth while, but Vince obviously didn't believe that at the time.