Is it really "disturbing" if it's maintained by mostly college students? If this was done by industry veterans I could understand your stance, but the way things are this feels uncalled for.
Everyone on the planet is using IPv4 and the internet, yet the understanding ends at 'what is a LAN and what is a port' for a shocking portion of developers. Not knowing about federation[0] doesn't seem so bad.
[0] Most likely this is referencing the term and the structural pattern; as you correctly pointed out, the concept is quite widespread.
Well, yes, it is honest, but it also is disturbing - which other well-known network principles were unknown to them?