Seven stupid mistakes teachers make with technology - Home - Doug Johnson's Blue Skunk Blog:
"Stupid is not my favorite word. It sounds mean and harsh and ugly. But after reading that according to Newsweek that 25% of employees visit porn sites from work, and that the adult video industry claims hits on porn sites are highest during the work day*, it was truly the only term that seems to fit this sort of human behavior. I don't have any overwhelming objections to pornography per se. But perusing it at work? That's stupid.
I use stupid under fairly constrained conditions. To me, a stupid act has a degree of willfulness about it and is serious. Making an error once is ignorance; making the same mistake multiple times is stupidity. Unfortunately, I see stupid acts and beliefs related to technology in schools all the time."