Profanity in presentations

I don't get it. Why should people use profanity in their presentation.

No matter how dramatic the effect or how important the need to use profanity, there should be no need to use profane language.

Dave McClure's - "DON'T Do A Startup, You Will FAIL" (http://www.businessinsider.com/dave-mcclure-startup-presentation-2011-7) [NSFW] is an example.

I think if you use profane lanaguage - either you don't have anything of value to say or you think using profane language gives you a macho credence. I am sure Dave McClure is a great accomplished person and would like to meet him one day. I write this post to highlight the problem and not to popularize the presentation.

I sincerely feel we should write kids friendly and readable content. It is important for us in the short term and for our kids in the long term.