>I don't like onions
can we just castrate these people
Onions are highly likely to trigger symptoms in people with IBS, which affects at least 10% of the population. So at least a portion of those are going to be aware that they should avoid onions, and may phrase it as not liking them.
How can people not like onions? I can't see how people dislike mushrooms or garlic as well.
But for real, do you know what kind of person that needs to be castrated? The kind of person that acts like an asshole for no real reason. The kind of person that will go to a thread, with the sole intention of making it worse for anyone that actually cares about the subject.