I won't be signing up to any of the bounty/Emma's diary stuff this time. I did last time but its all a load of rubbish, I never got any good free stuff! 
I also HATE the fact that they can come onto the postnatal ward.
I think I signed the Mumsnet petition against that (if I am remembering correctly!). Women are vulnerable, in their nighties, in pain, trying to breastfeed and we allow door-to-door sales people to come bothering them?!
I agree about how they often make out they are part of the hospital, and you get so many people coming to see you on the post natal ward (midwives, pediatric docs, other docs, baby hearing check person, etc etc) that its easy to assume they are 'official'.
I just told her no thanks but she kept coming back to try to flog footprint mould things etc.