THAT IS HOW ONE SHOULD PLAY--AVOID THE TANK and kill him last. Sometimes it is not possible, especially if the tank is proactively achieving things that--if left uninhibited--result in a loss... (like pushing the f**k out of towers and rax in DotA). The tank needs to create a reason for the opposing team to kill him. Sitting around being tanky is NOT a reason.There's no point having a shit load of hp if the other team will just ignore you and kill everyone else first. It makes your hero a poor pick.