This is fairly standard (if somewhat insane) practice for dealing with DCMA notifications. Because LL _can_ take material down, they are under legal obligation to do so.

It's an expensive and annoying process for LL, in fact any internet firm which gets hit by it.

There is merit in the DCMA system making it easier for folk to file takedown notifications, as this decreases the burden for small players who have been ripped off. Unfortunately the system of penalties for filing false notifications is not mature enough to dissuade folk from doing it aggressively.

Hopefuly the RIAA will continue bashing it's head on the courts and paying the penalties of wasting the courts time with lame copyright violation cases long enough to establish precedents to protect smaller players from the damages sustained in this kind of take-down action.