YouTube is all too aware of the potential for abuse of the dislike button, and it could soon take steps to make people think carefully about hitting that thumbs-down icon. Project management director Tom Leung posted an update this week revealing that YouTube is discussing experiments that could prevent "dislike mobs" from running rampant. It could turn off rating counts by default, require an explanation for a dislike, remove just the dislike count or even remove dislikes altogether. Leung was quick to acknowledge that many of these approaches have drawbacks. Asking for an explanation would create all kinds of logistical...