I overheard a conversation on the train. These two guys talked about one of their own relationships where they've broken up and gotten back with that same person six times.
Their voices projected throughout the whole train and not long after it seemed like strangers had all the gossip his relationship issues. They later on they discussed "indirect statuses" her friends made towards him and started a Facebook fight where of course the public can witness, watch and possibly laugh.
When someone breaks up, the worst thing anyone can do is getting involved and decide to cause pointless drama. It's bad enough a relationship has ended and depends how both parties take it, it's very black and white until the occasional mature compromise occurs.
People need to take a step back and let the people who've broken up take a breather. It's hard enough something didn't work out and it's harder when certain people are constantly 'fox guarding' and doing the unnecessary fighting.
One of the smartest things to keep in mind is, it's not their problem. It's one thing to be a supporting friend and make sure they're okay, but including yourself in the break up, it's not providing room for the person who has ended their relationship to grow and learn to deal with the agony themselves.
Give them plenty of space to work themselves out. Not everyone likes to be sheltered with company, depending on what person they are, it's much better to ask what they want. Rather than go out of the way to make them feel better in your eyes and might make the situation worse.
Break ups aren't always civilized, so the best option is to be the best friend possible in their time of need when they tell you, I need it.