Yes, but these scrapper bots aren't that sophisticated.

Crawl every link, now including SVG, and grep all 'mailto:' does not sound super sophisticated?

    wget --recursive --quiet $BASE_URL && grep -roh 'mailto:\([^"]*\)'

works on the example and just prints the email

I think the idea is that email scraper bots typically don't bother downloading images referenced by <img> tags.

But they will be as soon as this sees widespread use.

it won't be widespread imho, not when you share you email address with other parties that then lose/sell your details. fastmail like 'temporal' email addresses could help, however.

Querying DOM nodes is inherently more complicated than a regex on unparsed HTML.