If the dev doesn't care then what's the problem?
(Trust me I'm aware of the issues, it's the story of my life where I care and others don't and it wastes my time later because they don't)

Options:

Contact whomever hosts the site to take it down.

Contact sites and social media to spread the word on these sites.

Post a message on the site stating that the sites are not associated with the project.

Don't know if this would work with sourceforge or github, you'd have to ask them but on sites you own you can do the following and create a special message just for those that came from a link that linked to a site.
https://developer.mozilla.org/en-US/docs/Web/ … cument/referrer

*When reporting the sites to the below sites don't get caught up in if it matches all criteria for your specific scenario. Let them tell you that.

Google
https://developers.google.com/search/help/rep … -quality-issues

Microsoft
This is actually for DMCA but why not: https://www.bing.com/webmaster/contentremoval … tentremovalform
https://www.microsoft.com/en-us/legal/intelle … ty/infringement

Cloudflare
https://abuse.cloudflare.com/trademark

/EDIT
https://sourceforge.net/p/dxwnd/discussion/ge … ead/d91e97f7a3/
https://github.com/qarmin/czkawka/issues/1583

Yes it doesn't become an issue for anyone unless their names get dragged in illegal stuff.

I didn't give it a thought for over a year as you can see, unless I found out recently that my username becomes a profile on many websites where they track people's Internet profile (in my case, GitHub) and activity. They are just logging databases. Both the phenomenon is happening under the hood without prior approval.

Over anything its more about not harming reputation of the tool or any ignorant user