It’s unfortunate, but not all audience members treat speakers the way we’d like to be treated. People have a very short attention span and it shows. Instead of listening to the speaker like we were taught to in school, people are having side conversations or playing with their BlackBerrys in the middle of your talk.
This topic came up in my public speaking class last night and we had an interesting discussion about it. While many speakers think that this is caused because they are boring the audience, the truth of the matter is that some people are just rude and/or inconsiderate. I’ve seen this happen in a variety of situations and here are just a few examples: