I wonder if he has the dreaded "attitude" tag that guys like Spezza, Turris, Ryan, Karlsson, Anderson, etc, etc, etc.... have all had in their careers.
You shouldn't worry about a guy until you see first hand (or whatever hand fans see) what he's really like.
Keep in mind that these are often times very young guys that have a whole lot of money, women throwing themselves at them every time they turn around, and entourages of "yes" people surrounding them.
It's only normal that sometimes they get caught up in the lifestyle, or in the partying. It happens. It's not new, the only thing different now is that it ends up all over twitter and facebook.
Go read one of Phil Esposito's books. Those guys were nuts. In particular, try to find the story of when the Bruins players kidnapped Phil from a hospital, destroyed a door to get the bed outside and carried him through the streets, and upstairs to a bar so he could "celebrate" with his teammates.
Guys like Emery, Seguin, Redden, Kane, etc... aren't doing anything that pro athletes haven't always done. Like Mickey Mantel being so hungover that he would argue with the Umps to get thrown out of games so he could go sleep it off in the clubhouse.
So when you hear "Evander Kane has a bad attitude" or that he parties too much, try to keep it in perspective.
He's a black kid from a big city (Vancouver) and he's living in Winnipeg. He sticks out like a sore thumb, everything he does is scruitinized and he's basically living under a microscope.
Saying you "don't want him around the room" is pretty presumptuous as you can't possibly know what kind of guy he really is, or how his teammates would respond to him.