OK, here's my take on the whole Mikado thing.
Polly, you're right. Everyone is blowing this thing out of proportion!
For a start, for kids, the bloke could well be shocked at her enourmous Bridget Jones knickers, or that she has a funny tattoo of "I have working in an office" or "I hate that bloke I meet in copier room" on her thigh. Not necessarily that she's trying to photocopy her privates. Which she isn't, because the whole thing is big, messy accident and bad timing, and she just wanted some biscuits, and it was, oh, a great big regretable accident.
Also, anyone saying she trying to photocopy her vagina is an idiot. The vagina is inside a lady, not outside, so unless she has an external vagina, which would truly explain the surprised look on his face, probably a look of horror, so yes, that would propel the ad into the realms of gore movies, and I for one would not endorse such an ad, particularly before the watershed!
And for kids watching, it's a "tee hee! He saw her pants!" kind of thing, while still being fairly jovial.
Only those who have dirty minds will see this as offensive; anyone else will just see it as slapstick humour. Remember being 6, anyone? :0)