No on wants to be followed around endlessly by anyone in a shop, but a quick acknowledgement isn't really going to kill anyone is it? I am sure some customers can be rude and not say anything back, however isn't the point that they are are the customers and the shop worker should (shock horror) actually provide some customer service (if they are really uncomfortable with that they can even see it as taking the higher ground). Certainly some shops on Lordship lane (or rather some of the people who work there) seem to think they are doing you a favour by 'letting you' shop there - eg the staff at ED's who seem to think you actually going up to buy something isn't important enough to break the conversation they are having behind the counter... That said, there are some lovely people about - one lady in Mrs Robinson offered to entertain my 6 month year old child so I could have a browse. Now that's customer service...