I don't use sudo to improve my security; I use sudo because it's what I've become familiar with.

I don't want to come across as pedantic - the point I mean to make is that I think a lot of people use sudo without thinking about it much. Sudo's just "the way to use linux" for a lot of people I know.

I don't think the sudo contributors should be labelled as irresponsible, because everything they've added to the project is available for the public to see and scrutinise. I don't think they've ever mislead people; rather that people have assumed things.

Maybe people who care about security will notice now that sudo doesn't have comprehensive testing, and will make their own alternative.