I haven't eaten at a Denny's in years, and this story doesn't make me anxious to go there (or to any restaurant for that matter). There are sociopaths in this world, and obviously some of them get jobs in foodhandling. Fortunately semen isn't poisonous, so I guess it's not as scary as when they were injecting some kind of poison in the fruit at supermarkets in Los Angeles in the 80s, as part of a blackmail-for-money scheme. Several people died of that.
Charles