How Do Kites Cause Trouble?

There are various ways by which a kite can cause trouble to human beings and the trouble depends upon in what context you are using the word kite.
     
If you are using the word kite to describe a kind of bird then it can cause trouble in various ways. It flies at quite higher distance and may get hit by a flying plane and in that case the plane may have an accident. Sometimes they also come close to an airport if it is near to a field in search of food; they eat rats that are found in the fields. In that case also it may harm a plane.
      
If you are using the word to describe a square shaped object made of paper which people use in the game of kite flying, it can harm in its own way. The string people use to fly the kite is treated with the powder of lead and it can cut the hands of the people using it.