Should advertisers worry about Facebook’s recent 83 million “dubious” accounts announcement?

Should advertisers worry about Facebook’s recently announced 83 million dubious accounts? This is an important question, because advertiser are driven by numbers, ahead of all else. However, it is key to note that fictitious and dormant accounts are a common characteristic of ALL social network sites. They are not avoidable. Thus, the question should be: what is the tolerable level of these accounts that advertisers are happy to live with?