I used to think it would never change. I mean, your only violating a sites TOS. and In MANY cases (Such as creating a forum profile automatically) you arent even doing that. Your simply automating that process.
But after the U.S. gov started seizing domains early last year for anything from selling knockoff nikes, using copywritten images (like a site about mickey mouse), and the typical torrent/streaming sites, I more or less accepted that in the next ten years or so we are going to start seeing much heavier regulation of the internet.
Another solid example of things changing, is acia berry. That was the death of most rebills - and its crazy illegal to do it now (Without making it very clear to consumers.)
It might take a little longer, since something like SEO spam is pretty much near the bottom of the long list of things that (Really do) need regulated. But evantually its going to happen. Website spam will get stuck in the same kind of boat as email spam.