It depends on the country, in Canada you can certainly report them to the CRTC as breaking the law (CASL). http://www.crtc.gc.ca/eng/casl-lcap.htm

Emailing someone in Canada now requires consent (various legal ways) or close personal relationship. It doesn't cost anything to report them https://services.crtc.gc.ca/pub/rapidsccm/Default-Defaut.asp... . But if you really wanted to pursue them, you would have to hire a lawyer, a complaint doesn't have the same weight or speed of a legal filing.

This just goes to show you has clueless the developers are with regards to international policy and law.

You do realise that there is life and even entire civilizations outside of the USA, where DMCA holds no jurisdiction and the entire idea of suing becomes much more complicated? Especially when it seems from the GitHub discussion thread the tip4commit founder lives in a place where there is no regulations regarding what is a spam and what is not. ;)

If a project name was trademarked, you might be able to get them for trading on that name, maybe?

The Django Software Foundation is custodian of the registered IP of Django, including the trademark:

https://www.djangoproject.com/trademarks/

If you want to support Django and its community and development (which includes more than just commits to a git repository), there is also a mechanism to donate to the DSF:

https://www.djangoproject.com/foundation/donate/

Django's trademark is held by the Django Software Foundation.