Salespeople are wanted if you have explicitly gone into a store expecting to buy a certain kind of product. Then they are helpful sources of localised information. You want what they have and went looking for it.
Salepeople are not wanted if they are intruding and trying to push a product on you when you were not looking for it. If the methods or product are particularly offensive—that just adds insult to an already unwanted situation.
Salespeople are wanted if you have explicitly gone into a store expecting to buy a certain kind of product. Then they are helpful sources of localised information. You want what they have and went looking for it.
Salepeople are not wanted if they are intruding and trying to push a product on you when you were not looking for it. If the methods or product are particularly offensive—that just adds insult to an already unwanted situation.