Thomas: the one they show in the ad is probably for use in small offices. Large companies that send out mass mailings probably have the large machine you described.
Toggles: it varied according to time and place. Obviously, when the 12 "peers" were all men, long ago, it was easier for men to get away with it. More recently, when jurors are as random as one can get (the lawyers will, of course, try to tilt the balance to the gender they're defending), women have also gotten away with murder. "Crime of passion", as it was often described, tended to get the same leeway as self-defense... it's rather easy to convince the jurors that you got home, saw your loved one in bed with other people and killed one or more people because you couldn't think. Not something we've been proud of in our history, at least not enough to advertise it to tourists ("Come to our shores and kill your spouse!")...

Either way, that defense has been used in US as recently as the 50's, just take a look at the wikipedia article in the link below. And more recently, the sanitized version is called "Temporary Insanity".
Matt: I agree with Jason. All you have to do is look at the video that Toggles posted in the electric meters thread -- I really doubt that the kids came out with the choreography themselves, it's probably original to whatever movie/TV show the song originally appeared on in the 70's or so. And if you think that Marilyn Monroe's performance of "My Heart Belongs to Daddy" was too much for the 60's in "Let's Make Love", you'd probably be scandalized by Mary Martin's performance in "Night and Day" (1946), which was tame by the 60's. I just wonder how much of a scandal that song was when it appeared in the 30's.
Let's Make Love version (Marilyn Monroe):
Night and Day version (Mary Martin):
en.wikipedia.org