Earlier quoted context omitted.
I'm just somewhat puzzled that twox is a default. It seems like a prime candidate not to be just due to these sorts of inevitable problems. Lots of people new to discussion boards tend not to understand there may be different rules, sets of expected behavior, or the like on different sub-boards, so making something a default is likely to attract lots of people who are new and don't understand the rules. Once you coup…
"I'm curious why the mods decided to let it become a default." Seeing as reddit is just usenet of the 80s and early 90s on a web page in 2014, both in application, discussion topics, and more or less in culture, one lesson from usenet readers of the dark ages was there are or should be no default groups. I don't remember any default usenet groups in nn, tin, gnus... The same social pressures that lead to no defaults…
The news protocol specifically included a recommendation mechanism for "default subscribed groups", so that a news administrator could point new users to some important groups.
In Gnus that behaviour is triggered by the variable gnus-default-subscribed-newsgroups.
I'm certain that nn, tin and whatnot supported it, as well.