My DH and I both have mobile phones and use them a lot, so this isn't a problem for me. What I hate online, however, are those sites that won't even let me browse their online catalogue unless I register with them. That means giving them my full name, address, email address, and other personal details. Why? I may not even buy anything, but they have all this information about me! Well they don't, because I leave the site.
Can you imagine walking through the doors of Debenhams or John Lewis and being stopped by someone with a clipboard asking for your personal information before letting you into the store?