Of course you are free to express your opinion. It's just getting a bit boring that you only express your opinion when it's the exact opposite of what others think. And when you only do that, people create the image around you that you're always trying to start an annoying discussion.
And there is also a thing called being polite. Calling tattoos disgusting (and let's just forget for now that you're calling people losers for their personal taste related to designs) is fine, but if you think a bit deeper you should realize that you're somewhat insulting others because they are now feeling like they are doing something disgusting.
That is of course, if they'd care about your opinion. But if we wouldn't do that about anyone's opinion we wouldn't get very far, now would we.
Now you can say that you also have your freedom to insult others indirectly, sure. But don't blame us if we don't want to have a discussion with you and if we call you a dick
I must say that I don't have the feeling that I'm telling you something new, but whatever.
tl:dr: Don't post if you have nothing to add, other than your insulting opinion.