Are we talking, like CD warning stickers here?
Or like those roasted nuts packages: "This product may contain up to 0.1% pieces of gay. If you are allergic to gay, you may not be able to use this product."
[Edit: Some of the comments to this metaquote border on metaquoteable. That's never happened to me before - such a fun string of comments to a post I've made, anywhere, even if it is just a metaquote - and it's very cool. And flattering. So thanks.]