Compare to the real world.... if you have an advertising agency, and you shut down the company, do you expect that all ads you've had run in magazines to delete themselves over time?
No, but you would have the expectation that eventually, you'd be forgotten about.
The reason you use billboards for advertising is the chance that the billboard will not be resold to a new advertiser for months/years. You use them because you want to be remembered for so long as you possibly can. Internet just takes it to the next level, nothing ever goes away.
That is not why billboards are used. Billboards are used as a means of attracting as much attention in the short span of time that a possible customer may be in front of you.
Nothing of a billboard advertisement matches what is being discussed, which is the "right to be forgotten". (granted in the EU / UK atm)
The right to be forgotten means if you committed a crime a decade ago, and served your time, that you shouldn't have to constantly announce that crime as if it happened yesterday. Especially so for things that are petty in nature.
Wrong again, totally associated. Posting on a forum is exactly like posting on a billboard. Exactly. Both are voluntary, and public.