Nothing in their rambling even remotely supports their argument.
Yes, robots.txt is no magic bullet against ill-behaving crawlers (as proven by ArchiveTeam) but it never was supposed to be that.
You choose to ignore my specific wish not to be crawled by you? Fair enough, I'll return the favour and simply block your useragent
ArchiveTeam ArchiveBot/[DATECODE] (wpull [VERSION]) and not Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/[VERSION] Safari/537.36
# Remove the ^ anchor in case text gets prepended
RewriteCond %{HTTP_USER_AGENT} ^ArchiveTeam
RewriteRule .* - [F,L]