I personally wouldn't feel comfortable carrying a fake. I don't like who profits from it, I don't like hurting the designers who took so much time to design the real thing.. fakes actually upset me a lot. but there are obviously millions of women who don't care and do anyway. I wouldn't destroy them, but maybe use them in another way? Like as a magazine holder, or a cute little bag to throw scrap paper to recycle? When I am scrapbooking I put all my extra scraps in a cute little bag before recycling them. That way they can become home decor. Just a couple ideas.
I wouldn't say anything to your mom, it won't do any good. She already spent the $$, which to her was a huge deal, so there is no reason to make her feel bad about getting duped into a fake. Just thank her, say you love them, and move on! I have a friend who constantly carries fake Chanels and brags about how she drops so much $$ at the boutique, and I just smile and say I am happy she is happy. No need to rain on her parade I think!
Also good advice! You are very right. No need to hurt the innocent. Thanks ladies for letting me sound this out!