I've twice PMed people on here and asked them about books/authors their profile said were their favorites, to be replled "I dont read books, books are boring, I just wrote that to look good on my profile"....
No, I've never lied about reading books, except at school perhaps haha, if I've not read something I am more than happy to admit to it. Though, like kadushu I dont always admit to some books I've read simply because I fear boring the arse off people!
(I dont tend to read fiction unless its dickens or goldsmith etc) - I have a quirky taste in non-fiction that might raise a few eyebrows, so best if I act like I dont read, personally the majority of people I've come across arent interested in books so I dont get the opportunity much to share my enthusiasm.
If a person lies about having read a book just to impress I think it makes them less attractive, I'd be more impressed if they were honest and admitted to being totally illiterate, but then they probably not be PM-ing me - ha!