Which they don’t respect. I’ve had it for my blog for years and they still added it to wayback machine, see my last comment for their official announcement of the ignore robots.txt policy, it is not new.
> I’ve had it for my blog for years
Just out of curiosity, why don't you want your public blog archived? not questioning, just trying to understand the logic/motivations?
Also, I think you're being unfairly downvoted.
robots.txt means they shouldn't auto-scan your site. Any user though can go to the wayback machine and type in a URL and the wayback machine will read that URL. That was the intent of robots.txt (don't scan) not (don't read period). It's spelled out in the spec for robots.txt