Technical question, apart from the (valid IMO) political arguments: Google's idea to implement this is to append the text fragment to the URL in a "#targetText" pseudo-query-argument in the URL fragment part. This sounds like it would extremely easily break existing web pages who use the fragment part for their own state. In the blog post, there doesn't seem to be anything addressing this (or even just specifying how…
That's not true. Truth is:
> We'll just completely change the commonly understand processing model of fragment identifiers, it may not be fine, but can you really stop us?