This must to my knowledge have been one of the most violent millenniums yet - at least that I experienced myself!!!
First off, the guy you are talking about walking around the site all weekend was as Basti correctly said beat up the very first evening - got into what he thought was a taxi but turned out NOT to be.... Was mugged and jumped on but luckily enough got out okay, AND the police actually caught the people responsible - coming straight from himself he said, that the police was actually really really proffesional and helpfull! He was supposed to play but obviously couldn´t this weekend, we are all just happy he´s okay again !
As to the other things - there´s so many stories and sides of everything so not quite sure IF it was actually 1 or 2 different fights - BUT the one I heard about (arrived at the SPL spectator side like 5 minutes after it happend) took place right there in the crowds and some one supposively jumped a guy after he had pushed someone (and more people then "joined" in to beat him up proberly!!)... I wont say more than that as I´m not quite sure what is actually the truth - BUT as some of the people involved could acutally be named and shamed, I honestly believe the Millennium should ban those people involved, that in NO WAY belong in a sport that already as it is has problems being accepted as it has "violent tendences" as people outside the sport looks at it.
I say BOOOOOH big time for those not being able to control themselves and that especially on a site like this with SO many non-paintballers as spectators, so very sad the people involved could not control themselves, SHAME ON YOU !