So Im thinking about an unspecific situation where someone writes a paper that is anti-israel in college. Then, <insert situation> happens, and they are pro-Israel. The fact is that paper is out there, published or not, and record.
If you were to write an editorial for your high school paper, I dont think you have the right to have it redacted, removed, expunged, or otherwise deleted because your view point has changed.
I would feel the same way if we were talking about someone who made terror or terrorist threats to a newsgroup 20 years ago, even if that person no longer believes it.
Your own blog, website, server, thats your stuff. You start putting things out there, someone else's or a company's equipment, hosting, etc, its really not yours any more.
re: retroactive intellectual property - I agree, if the point is that youre trying to protect your intellectual property and/or its being used for an unintended use. The SMB cab is a prime example. If someone choose to clone it via CNC, LT would, and SHOULD, do whatever it takes to protect his ideas/pictures/product from being produced in a situation that he never intended OR approved. Likewise, if he decided to now mass-produce said cab, I feel Nintendo has every right to do whatever they need to protect their intellectual property, copyrights, and trademarks.
Im not sure I will ever be persuaded to agree with the right to forget movement, but I am definitely all for hearing how/why you feel so.