Earlier quoted context omitted.
It's not about open source maintainers. This isn't an "open source" problem further than the fact that Daniel's software is used in a product they are using. Daniel could take a couple of seconds to ignore this email and there was very little time wasted. The real "disrespect" should be whatever engineer put Daniel's name into the spreadsheet that blasted out these emails. Someone didn't do their job and is checking…
Daniel could take a couple of seconds to ignore this email and there was very little time wasted. So, in your opinion, sending spam or robocalls is not in the least bit disrespectful to whomever is on the receiving end?
As I noted in another thread: A simple response pointing to the license should be the default response to requests like this which can be automated.