Wes hammered that one home.
Most definately, you can't wash a tattoo off. Also, if you are infact able to go through the crappy process of getting the laser lined up for the job, and infact get all of the ink removed(Doesn't usually happen), you're left with a patch of skin which isn't the same tone as the rest, so it's just as well if you had to have the tattoo there. However,
There is one way you could remove it without having it's outline in your skin. I'm not sure if this is done anymore

but nitric acid used to be 'tattooed' under the skin where removal was requested, and it would burn and cause the skin to 'pus the ink out' and scab over. I think it was a zinc stick or some kind of stick would be rubbed over to cause some kind of reaction... A rather painful process...
Either way, wait and choose wisely.
edit: Typo