One of the findings of the Kates and Mauser paper, which is listed in the references, is that there are innumerable ways to kill people, if you are of the mind to do so.
Of course, this pencil is a deadly weapon if that is my intent. Luckily for all of us, we are not so intended. Knives are all over and are easily available, as are blunt weapons. There are fewer people being killed by telephones now because telephone technology has changed from big, heavy, ugly, black things to little, light, plastic, pink things. Be thankful our local perpetrators don't watch more television or they would discover that bombs are much deadlier than guns.