I think it is hard though, legislatively, as the RTBF already proves. It's a terribly vague set of rules that put search engines in the position where they have to evaluate a claim and then sit in judgement over it with little to no oversight and then only a public form of objection if this somehow ends up in a court. This is not a good process. Adding more reasons to use a bad process doesn't sound like a great idea regardless of how well intentioned they are.

An issue I see are massive Streisand effects. One is occurring if you need to take a Google to court for not following up on your RTBF claim. Nobody really cared about your drunk driving incident from 2019 until you fill the headlines with your court proceedings. Now everybody knows. The other is this: let's say Roberta became Robert. Calling him Roberta would be dead naming him. But if every time I framed it as "Robert Streisand (known until 2023 as Roberta Streisand)" I'm merely stating fact and I don't see how many courts will intervene against that. Why can virtually everybody still dead name Chelsea Manning? Because every time her name was mentioned post transition they added this factual context. So all you will achieve in the end is that all trolls and dickheads will just use the legally defendable boiler plate phrase. And hang a much brighter lantern on the issue.

Just to be clear: I'm not defending anybody deadnaming somebody else. I'm just looking at this issue, the RTBF, and I'm thinking of that road to hell and with what it is paved.