Nah, I'd say bad analogies...
Tattoos aren't addictive or cause cancers etc.
I've not been under the influence whilst having them
I've not been bothered about 'cool' for the last 20 years. Yet 50% of my tattoos are under 5 years old.
Drawbacks... none I know of. Mine are in positions where they are easily covered up and usually are, they're rarely displayed as they are done for me.
and I fancy another. Preferably 'Sak Yant' style.
http://www.youtube.com/watch?v=psM357MWXy0
Nothing nasty in the ink, if there was the cobra venom would kill it :D