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There is nothing more stupid or frustrating. This is like going into a bookshop that bans reading.
They shouldn't sell cameras.
I don't carry a pen with me all the time and if I do I won't be carrying a note pad. I take photos of products to remember the name, model and price. No one will pay 5390 EGP without researching the bloody thing they are buying.
And this is not the first time I take pictures of what I want to buy. Nor is it the first time I take photos inside Radioshack.