Back in the days of MSN Messenger, (Y) was a coding shortcut for the "thumbs up" emoticon. Many people continue to use this symbol to convey approval or affirmation - even in chat clients that don't support the code. This practice must be stopped. With firearms if necessary.

If you're a casual Facebook user, you might be wondering what the deal is with all those weird emoji things that are suddenly appearing below your posts. These are Facebook's new reaction buttons for statuses that require more than a simple "like". We explain what they do and how to get them.