I don't think in the current climate "having a zero-repercussions way out" is an unreasonable thing to want. Heck, I don't think merely having an incorrect take on a technical issue is something that should ever warrant "repercussions", unless it's intentionally claimed from a position of authority.

But more than that I think these silly single use websites are just gold marketing. They're very memorable, I don't think we'd have collectively remembered the "motherfucking website" if it was just a blog, for instance. It's a bit daft, but what can you do.