I did this for a presentation in the mandatory comm class first year of college. A big relief because I didn't worry about the stutter and hiding it for each presentation. Probably the most fun I had speaking in front of people. I don't tell people I know because it's no big deal. They all have their own issue they're ashamed of and the reciprocal act of not labeling them by petty things works wonders. I could be equally cold and harsh and nitpick but know better not to let anyone else experience more of the same self-loathing.