I was horrified to see Alton Brown cleaning roasted peppers. After removing most of the skin and seeds, he "washed" it for good measure, sending a good amount of flavor down the sink, as far as I'm concerned. I know there are a few cooks in Mexico who do this but Brown has such a superior attitude about things that it's off putting. \
A few seeds won't hurt you and the brown bits clinging to the pepper are delicious.
I saw that same episode - one of the reasons I have given up on the food channels and stick mostly to PBS.
I never see Mary Ann Esposito or Lidia Bastianich do that, in fact they usually use a paper towel to remove the excess skin and seeds and say that a little left behind is not a concern.
When I still wore contacts, I ruined a pair when I removed them at the end of the day after washing my hands numerous times after handling some very hot peppers.