Part if me says if you don't have to cover and you do anyways because you're scared of how you'll be viewed, maybe you should reconsider getting tattoos, on the other hand if you cover in certain situations related to improving your professional career that's ok I guess, but as I grow a little older I'm at the point where I do want to work for companies/people that hold my personal choices and beliefs higher than my ability. Also if your appearance is louder then your ability to do your job, maybe working harder is in order, not only will you look better but you could spare someone else some discrimination. As far as tattoos being a secret, if you feel that way, go get them removed.
Let me elaborate, being tattooed doesn't buy you into any secret club, maybe decades ago, but not now. Acting as though the ability to wear tattoos or get tattoos makes us special only makes it easier to be discriminated against, nothing to hide here.