There's a problem where generic skepticism of intellectual property law— which isn't bad in and of itself— all too frequently morphs into uninformed all-consuming opposition to any kind of IP enforcement whatsoever, without understanding the purpose it serves or why it might be necessary.

"The code is open to forking, but we need to enforce our trademarks because otherwise anyone can upload malware claiming to be Notepad++" is a real, legitimate concern and not some kind of ghastly imposition, but I think whoever sent that email didn't even bother thinking about that. They just saw somebody defending IP rights and went straight into attack mode, because that's what a lot of online communities have trained people to do reflexively.