I'm divided on this. On one hand, if everyone can use whois privacy, what's the point of whois? On the other, I guess bad guys can always put in fake names or create their own shell companies, so we might as well let everyone have it.
Oh speaking of Markmonitor I just send their DMCA emails to spam now (they can send me a proper notice via normal DMCA channel as is required if they so care) since every single one is for a dead pages or false notices, hell they even sent one the other day for a domain not in used in 7 years!
Obviously the usages of WHOIS have drifted over time to go beyond that.
I could however see a strong argument to remove the email field, as any email address will be abused regardless of whom or what will actually read things sent to it.