Correct on all counts. People need to realise that smart people tend to have short tempers because they've encountered the same idiocy many, many times; the first few times they may have explained patiently but after a while it begins to get wearisome. People with precious, precious feelings should stay away.

"The entire principle is wrong: it's like insisting that adults live on skim milk because the baby can't eat steak." - Heinlein