It's really sad to see my fellow FOSS enthusiasts adopt this very strange vocabulary from the anti-pirate people. No, no one has stolen anything, the knowledge is still out there. No, you cannot even "shameless copy" from something that is asking the world to copy from it. Literally the point for me and others is that what we put out can be used by anyone for anything, that's why we use FOSS licenses in the first place.
yes you can if you do not honor the license that the original was released under.
that's why we use FOSS licenses in the first place
some FOSS licenses are intended to insure that the code remains open even after modification. that's used by anyone for anything under the same license.
I think how deeply you care about this and the way you castigate other people is unhealthy and it is critical for your own well-being that you come to terms with it.
As Lin-Manuel Hamilton said, "God help and forgive me; I want to build something that's gonna outlive me."
But of the points is that no-one owes anyone anything, if you use my code I don't owe you support or anything else and by you using it, you owe me nothing either, no money, effort or anything else. Sure, if the maintainer want, it's nice when people fix the issues for the maintainer, as long as they want it, or that people and companies donate when maintainer set that up, but in no way should that be an expectation just because the creator slapped a FOSS license on what they made public. Don't want people to (mis)use, criticize, mangle, transform or copy what you've created? Don't use those licenses then.
This whole "no warranties" and its related intentions goes both ways, intentionally.