I guarantee you that 90% of Lakers fans have no clue that Paul Pierce lives in LA or is from LA, and give him a hard time when they see him (though I'm sure they don't go overboard or anything - they aren't NY fans).
I don't know that 90% of the Lakers fans would recognize their own players away from the court, let alone players from other teams. And how many of those fans are diehard enough to say something to an opposing player if they did figure out who he was? A few hundred?
I classify Laker fans into three groups:
1) There is the group BBT is talking about. These are the *fans* who can afford to be seen at the Staples Center.
2) The casual sports fan not from LA who just wears LA garb out of bandwagon popularity, similar to Yankee hats, or because they want to fit in if they move to that region. They might know the players and some of the history, but they are not invested enough to give Paul a hard time or care one way or the other.
3) Lastly, there are the true LA fans. They seem to be very knowledgeable about the history of their team and the history of our beloved Cs. They truly despise our Celtics as much as we do the Fakers, and are as likely to say something to Paul as we are to Kobe (even though Kobe isn't from Boston and didn't grow up a Cs fan). As much as I want to view all Laker fans as the first two categories, there are a lot more of the third than I would like to admit.
Those 3 groups sound like Boston.
I know many people who wear Red Sox gear, but really have no interest in the team, nor the sport of baseball. They just wear it because of the city.
I think this is mostly irrelevant to the OP. The question can be answered by referencing the people who realize he is from LA.
Does it really make a difference if someone is from the area? I am from NYC. I do not root for Lamar Odom. I have no problem rooting against him. LA is a big city. Native sons are a dime a dozen.
I'm not really sure how to interpret your response Guava. I can't really tell if you are trying shoot down my response as irrelevant, or what. So, I'll just try to clarify what I intended to communicate in my earlier post, as it seems a couple of you may have misinterpreted my comment.
Guava and Mr. October, I certainly didn't intend to suggest that my tongue-in-cheek fan classification system was specific to LA Laker fans only. I see the parallels across every city and sport. However, I would say that in specific regard to basketball fans, the fan characterization is more pronounced in LA than anywhere else.
I also want to point out that I discussed the first two groups in response to a discussion that was taking place between PosImpos and BBallTim. Thus, it wasn't intended to be totally relevant to the OP. That said, I thought it was pretty clear that I take the position that folks in the first two categories wouldn't care about Paul being from LA and playing for Boston if they were to see him in LA. The third group, however, would clearly understand where Paul is from and might be bothered by it, and there are more true LA fans out there than my biases toward them allow me to admit (publicly).
As an aside to Guava's comment, personally I'm not bothered at all by non-baseball fans sporting Red Sox caps strictly for regional pride. That's fine. I am somewhat perturbed by the person in, say for example, Las Vegas or Memphis who thinks wearing a Sox hat is trendy and somehow makes him/her cool. Of course, I prefer to see that over the same person wearing a Yankees hat. It is a conditioned response for me. In terms of basketball, however, I see this situation with Laker jerseys and hats much more than any other team. It's not that it doesn't occur with other teams, it is just a ratio thing.
Somewhat getting back to the OP's question, any reasonable fan anywhere is going to understand that that sports is a business, and there is no real justification for being mad at someone just because they were raised in your city and now play for a rival. That said, sports make fans irrational, so I could see some folks in LA being perturbed by Pierce since he was once of them but has now adopted Boston, embodies everything about the Celtics, and humiliated LA in 2008.