Lol I'd say soething "ZOMG Sasuke, I never knew you like My Little Ponies!!" o.O (tha horror XD) Then I'd run off and get my friend so she can tackle him :D
Don't laugh or flame me but when I first saw this I thought he was buying perv films (the whole "not fit for theaters" poster) but I get it now.
If I did see him in real life I would first think it was some freaky fan dressed up like him for some wierd convention.