Sort:  

Cross linking is done all the time in the comments when it makes sense. If someone talks about determinism, I have a post on that I can link to. If someone's into the morality of A.I., I'll link to that. Being involved in the comments and leaving relevant links people will enjoy reading has nothing to do with a generic hashtag which has no meaning other than 'Hey, I did something for you, so you should do something for me."