I do agree with this trend, while there are some comments like "we just want to get the work done and not worry about being nice" I do think they are forgetting about a certain part. I as a developer might not contribute to certain open source projects due to the fear of being called things against my gender identity (I am transgender) or being yelled at. And the thing is that I am not getting paid or anything to do it, so instead I am just not going to contribute because I don't want to try to help and instead be yelled at. I think that the free and open source software community is moving in the right direction by making code of conducts or other similar things.