That person YouTube who got some publicity a couple weeks ago for proclaiming that we should leave Brittney alone actually had a valid point despite the fact that he appeared overemotional about the subject.
Few people realize how inherently wrong it is to pick on celebrities, but the vast majority of celebrities the general American public does have the decency to leave alone. Others like Brittney, Lindsay, Clay Aiken, Christina Aguilerra, and recently Tom Cruise serve an important need in the entertainment industry: Material for talk show hosts' opening monologue jokes. Of course, there are the awkward occasions when one of these guests is actually on the show (rumor has it that J.Lo refuses to be on Conan O'Brien, for example) but it puts the talk show hosts in the good graces of the public as well as their other celebrity guests in the leave-their-private-lives-alone class who enjoy a good laugh as much as the next person.
You would think that these talk show monologues are a small part of a talk show and therefore insignificant, but keep in mind that this industry is expanding to include the likes of Best Week Ever, The Soup, Chelsea Handler, and the TV Guide Channel. I saw Chelsea Handler's show and while she's an admirable comedian, her list of people it's OK to make fun of consist of only five people. If Brittney were to suddenly live a noble, decent and healthy life, Chelsea Handler would lose 20% of her material! So, therefore it's in the interest of people like her to make sure Brittney keeps screwing up in life and to portray her that way