This is ridiculous, all blame/liability should lie with either the provider of commercial software who chooses to rely on open source software or the end user for relying on free/open source software.
I personally will not allow people in the EU to use any software I write going forward, I imagine other open source developers will take these steps as well.
I personally will not allow people in the EU to use any software I write going forward, I imagine other open source developers will take these steps as well.