1) I am fully aware crimes like the one in the initial post happen (unfortunately) but they generally don't happen en masse and if they did I am betting the police would have a note on their website or have gone on TV to warn people if that was required. Honestly, this hoax is a bit like an old fashioned fairy tale designed to scare people into obeying the moral of the story. You're best to be sensible re safety (and let's face it, crimes can happen in any way, in any place), but you're more likely to be in a car crash than involved in a crime of this magnitude.
2) most shampoos have pretty much the same stuff in them, just variations on a theme. Take a copy of what is in them and compare.
3) your mother's hairdresser may fully believe the stuff about sillicone in Pantene and may have been honestly concerned that it wouldn't work. She may not have been tryng to sell her expensive product but simply duped by the same myth - not entirely beyond the scope of reality given that while hairdressers are trained in what they do, they are by and large not chemistry grauates and would only be going on what they have been told will hapen if they mix x with y.
35kg lost. (November 2005 - October 2006)
15kg gained again (as at October 2010).
Back to the drawing board - Let's do this thing!
"You can't change the winds, but you can change the sails"
"Reach out and take control of what lands in your lap"