I got bit by infinite scrolling yesterday. I liked an article, clicked in the URL, copied and pasted it into a group chat with my team... and then noticed it was the wrong URL. The fine website had "helpfully" autoscrolled a smidge into the next article, so it updated the URL box to the next article. Lesson learned-- read before pasting...
You might resent the autoscroll on the website, but did you consider that the group chat program also has an infinite scroll, for chat history? Imagine what a hypothetical scrollbar for the group-chat program would look like if it had one, and if that scrollbar actually represented your relative position in a complete timeline going back to when the chat-group was created. :)