The maximum width of my ninja 250 is 28 inches, and that's at the handlebars. I've never hit an automobiles side mirror while lane splitting.
I think this is what gives lane splitters a bad rep. This is absolutely suicidal! Flying in between cars 30+mph faster than they are going is absolutely ridiculous.
This is more along the lines of the type of lane splitting that i do. Slow moving/stopped cars and me traveling 10-15mph faster then them.
Listen right at 7:30, he passes a guy stopped on a large touring motorcycle and the guy goes "Stupid!"