This isn't a slippery slope, this is simply a cliff. There is no right to be forgotten, because it would mean I don't have a right to remember and thus share that memory.
Think about it, if I printed a memoir in the 1960s, and have, perhaps negative, anecdotes of various people, would that book have had to be recalled from the shelves a few years later just because the right to forget kicked in? Oh right, internet. Changes everything.
The human species is going to have to grow up a little. First as an audience and consumer of the net, and realize that just because it's on the internet (or even wikipedia) doesn't mean it's true. It also has to realize what people said in the past doesn't always pose a true reflection of their current selves - that people change and evolve. Especially from a younger age like 13.
Second, it will have to grow up as individuals and realize, when you put it out there, you put it out there. And no nanny state can fix it.
They can only provide the illusion of fixing it. Because search engines outside the EU are going to ignore this. And savvy people inside the EU will be able to access those with ease, while the heavy handed censorship will only provide the drones with comfort they are taken care of.
Guess what a person's right to be forgotten would turn into in the US? Corporations, who are people, would jump in it.
Why is this being pushed so hard now anyway? Well, Germany got it's hand caught in the cookie jar along with the NSA. It's BundesNachrichtenDienst (BND) works alongside with and is just as if not more invasive than the NSA.
Of course, Merkel gets to put on her show and dance about being outraged her phone is tapped, but she says nothing about how complicit she is in tapping everyone elses phones in her country.
And don't think the EU countries are any more innocent in this.
So instead of really protecting the right to privacy, by people who want privacy in the here and now, by pushing bulletproof encryption standards without backdoors and other actual net positives for their citizens, they just put up this debate of this none-issue that feels really good but does nothing except what government is typically good at - banning certain behaviors from private entities and censoring hot potatoes from public eyes. Ony it's third speciality, making a tax for this, is missing and probably coming. Perhaps an ISP tax that will "help monitor and enforce your privacy online", which is code for another 1000 workers at the BND trading people's naked selfies.
So putting this as some slippery slope is unhelpful. It implies that this is an actual issue that needs to be hammered out. No. It's just bullshit sand-in-the-face for those who don't see what's really going on.