It is flagrant and a distraction. Just like someone who writes messages like this in all lower case without capitalization. It breaks the norm so much that it c

It is flagrant and a distraction. Just like someone who writes messages like this in all lower case without capitalization. It breaks the norm so much that it constantly draws my attention to the choice of writing style rather than the message itself. As I was reading the original comment, and before seeing any of the comments about the style, I found myself highly distracted by the "U". Wondering why someone wrote that way, what the purpose was, and so on. Because of the fact that it significantly distracts from the message, I think these abnormal styles are insulting to the reader and so are not something I would recommend or condone in contexts where normal writing is convention. (On IRC or in instant messages/Slack, the style is different and it's OK. But you can see what the style is on HN by reading comments on this page.)