People who email the whole class when they need something are annoying

I'm in college and I absolutely hate it when someone in class uses Moodle to email everybody when they don't understand something. The big deal is that I get alerts on my phone for my college email and I don't want a buzz-in for something that is worthless bullshit. I almost never respond to these emails unless I know the person because it's not my problem, I simply don't care, and I'm pissed that they bothered to send everyone an email about their problems. I also figure that someone else will respond so I'd just be wasting my time. I am not the person that a stranger can annoy with their college problems. I have never sent a mass email and never plan to, because it's just plain annoying! I will email the teacher themselves if I have a serious question. I just don't want other people to bother me with their problems unless they are my friend. I have only one friend at college, so that rules everybody else out from emailing me about a school issue. I know that having only one friend is strange, but I'm only interested in this one person. I learned in psychology class recently that in terms of friends, a person only needs one to get the benefits of having a friend. Is it normal that I think this way? Am I being too harsh?