I'm a little late on this one, but I'd like to add my 2 cents:
I do consider all of those things adult: gambling, dating, and cigarettes. It's an exit link - I go by the CYA theory. If a kid does get on your site, at least the exit would go to something they are allowed to see/buy/use.
Just another one of those quirky things that will differ with each LL owner.
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