He that blows the coals in quarrels he has nothing to do with has no right to complain if the sparks fly in his face.

Stirring up a fight that was never yours puts you inside it. Once you have taken a side, added heat, forwarded the message or repeated the remark, you have joined the quarrel and become one of the people it can burn. The surprise felt at that point is not really justified. Heat travels back along the same path you sent it down.

Notice the arguments you are drawn to that have nothing to do with you. Before weighing in, ask whether you would accept the consequences of being a participant rather than a spectator. If not, let it pass without your contribution.