Of course they look ridiculous, but they do serve as a symbol of the potential ugly heath risks of smoking. They will probably never be a big hit in the fashion world, but for an anti-smoking campaign, they could become a tacky and effective prop.
Implications - Still, I'm sure some hipsters wouldn't mind rocking these tobacco-inspired earrings. What better way to be alternative and express individuality than by accessories with a pair of rings everyone else finds utterly repulsive? These things are totally hipster-bait.