Broken Legs: Why?

I still don't understand, it seems to be happening more and more. Why do crazy players decide to tackle other players wildly and ruin their season. This picture is of Eduardo's break but there are many other big players who have had the same problem (Djibril Cisse [twice actually, the same leg!], Aaron Ramsey, Abou Diaby and today, Bobby Zamora).

The fact that Arsenal players seem to have leg breaks more than other teams, I think, is not a coincidence. They are not a very physical team and so other teams attempt to exploit it: it's absolutely disgusting. It was the same story with Fulham today. Although I have yet to see the tackle, I have read that Karl Henry, the tackler, did a crazy challenge and as far as I can see he didn't even get sent off.

Players who get broken legs spend their season on the sidelines but that's not really the end of the story. There can be complications, and depending on the break, ligament damage could also have occurred. All that is needed is that on the player's first match back, he gets a rough tackle and he's again out for a very long time.

Please refs, if any are reading, get your act together. Don't give a yellow when there has just been a leg-breaking tackle: send em' off!