I tried this once but didn't get any likes in return.
But I think that isn't the only reason I won't try this anymore. Just as Sara pointed out, liking a page when I'm not genuinely a fan only brings clutter to my wall. Additionally, I'd like to keep my profile clean with genuine interests.
I've also realized that this type of marketing doesn't breed a good social community. Since the fans aren't genuine fans, they don't really care about your posts or photos. Thus, even if you have a lot of fans, almost nobody likes or comments on your posts.