I open my mouth once in two months and I upset someone. Fantastic. I won't justify with an angry response save to say if that's all you've got to worry about, you're doing ok mate.
Don't worry about it dude, I hear worse from customers at work But the problem is, most people forget that the staff have no control over a lot of stuff, we're just the people who have to take the abuse for the people at the top's decisions