The only slight concerns I have with research like iths is it might give some people who participate in bad habits, the ability to think there's a get out clause for their actions.
There was a similar thing last year, when supposed research claimed a positive link between tobacco use and Huntingdons disease. That kind of research, (if it was true and I doubt it), is just the sort of damp squib, that can get in the way of peoples need to stop such habits, and might help to encourage a "live a little you could get hit by a bus tomorrow", kind of attitude.
Hopefully this research doesn't make certain people believe, that bad habits are acceptable, when there is some kind of abstinence opt-out clause, offered to them by science
.