It's the second time this season it's happened with Hellas, it's an absolute disgrace. I believe last season the curva sud, (the section this came from) was closed for a match or two as well.
I've been there a few times, it hasn't happened during those occasions, thankfully for me the guys that I meet up with are as angry about this as any right-minded person would be.
I've told them I won't be going back any time soon while this is going on.
Italy have a huge social problem over racism, immigration etc. and as with the Inter Milan fans told their own black players the other week, they don't see singling out an opposition player over the colour of his skin as anything other than 'banter', and trying to unsettle them, it's wrong, plain and simple.
I messaged a mate about it at the time as I was watching the game, and told him I hoped Mario smashed in a 30 yard screamer, it's just a shame his 20 yard goal didn't cost Hellas any league points.