De-merits on online shopping :-
Online shopping may cheat the people by displaying a product while the customers where selecting; but, the product which is delivered may be of poor quality.
One can't always relay on online-shopping.
Most complaints arising against the online-shopping states that, the products are of old-modals. If new models are displayed online, the products aren't working atleast for it's average span.
Some people start websites for online-shopping and get the addresses of the customers, and collect their money, and then, try to escape with the money. Thus, this results in the loss of secure feeling of buying products online, among the consumers.
These are all the points against - "online shopping".
Hope this may help you.