Weird, isn't it? I would mention QVC without worrying, but shopping from a catalogue is something I would not want to mention. Don't even know why, but I suspect it's because my mother is the same and it's ingrained in me!
EVeryone went nuts when I used my Lulu Guinness bag in work and pestered me about it - didn't fess up it came from QVC.
Maybe because catalogues were always famous for giving credit? "just £1.33 a week for 150 weeks" etc
I do admit to buying from Le Q but I always feel the need to quickly follow it up with an explanation of my actions, going something like - "they do all the top brands you know and you get to see how to use it too, and you can send it back if you change your mind".