I know this has been going on for ages, but seems to have got worse recently. A cashier in superdrug yesterday asked three times if I would like a store card and was surly when I said no.
Repeat experience in Paperchase - no I just want to purchase this (overpriced) mother's day card and leave and no I don't want stamps or pens too - I'd have asked if I did.
And despite much bad publicity on it WHSmith STILL do all the "do you want this shit chocolate/sweets" every time. I know the people on the till have probably been told to do this, but most (all?) find it annoying and it holds up the line - even their bloody self service machines try and flog haribo and chocolate oranges.
And finally, does anyone else hate the cheery m&s self-service "have you scanned your sparks card!" 