A couple of thoughts:
First, it wasn't a Laker fan. Why would they bother? It's not like we're in the middle of a huge playoff run with them or anything...
Second, I think quickdog - and Bibby, BTW - have the right idea. It was a juvenile act done by someone who probably can't walk and chew gum at the same time. There are bound to be a few "fans" out there - you know, the ones who have to compete with a box of rocks on the IQ scale and the rocks usually win - who think it's cool to express their disappointment about the season by egging Bibby's house. Quite frankly, I'm pretty relieved it was just eggs...
Personally, I'm not going to devote much more time thinking about or discussing it. Whoever did it has already received too much publicity for being an idiot IMHO.