In principle, good point. In practice, it really depends on where your levels of cynicism are at. Crediting FB with wanting to "produce 'integrity'" or even that they're "trying to fight" the myriad of destructive externalities their money-geyser has spewed forth is.. generous.
I think the point is more that they are fighting click-spam and other kinds of advertising fraud, to maintain the integrity of their advertising platform, in the sense in which an antivirus is maintaining the integrity of your system; NOT the sense in which an anti-graft law is maintaining the integrity of a politician.
