Where does the constitution guarantee "freedom of expression"? If so, then I can express myself by yelling "fire" in a theater?
First Amendment speech rights gives us the right to freely question our government without fear of repercussions. It does not give us the right to publicly push unnatural sex. I suppose you back a plate that says "abrtnroks" "dgsrok" or "ctsryum"?
BTW our constitution has several amendments beside the the first which gaurantees us certain rights, even though those rights may not be spelled out in detail.
Among those rights are the right to life, liberty and the pursuit of happiness. I guess that pursuit of course is up to what YOU think it should be.
I do not think queers should be married, I do think they should be able to express themselves on vanity plates as long as the wording is clean. Gaysrok is not a dirty expression except in some peoples minds. You evidently hate gays, and I can sympathize with that, but freedom is freedom. You have the right to critisize them, they have the right to say they rock.
Of course your double standard won't allow you to admit it.