@P.J. Morse I get 20 to 30 emailed queries per day. And yes, it's voyeurism. It's not actually something to help writers be better at writing, or better at the business of writing.
@jaimealyse True. But it's hard for some writers not to see mockery in quick dismissal online.
These exercises are not as helpful as literary agents believe they are. They have backfired in the past (there was an epic "queryfail" incident on Twitter in 2009 involving a dozen agents rejecting queries in real time). I'm a literary agent myself and I wince whenever I see another agent doing something like this on Twitter.