Substitute teachers

Currently im sitting in the library with my friends becca and kaitlyn. We were casually talking about things that i could blog about when all of a sudden this substitute teacher comes up to us and says, "ladies, voices down!" Our first instinct was just to say okay and let it go. We continued talking and he comes over once again and tells us to be quiet. This happened FOUR times! What the heck has this world come to? I can't even talk int the library. Okay first of all, we're not even in his class, and second of all, we're not even talking loudly!!!! And plus the class that he's watching is talking too, and loudly might i add, so how in the world can he yell at us when the rest of his class is being loud and obnoxious and we're not even in his class! Clearly he's singling us out because he doesnt want us sitting with his class. Well guess what, there aren't any other computers open so i guess he's stuck with us for another half an hour. It's ridiculous. His class is playing a piano on the computers and its BOOMING throughout the library, ohhh no sorry that's not annoying at all let me just sit here and try to do my work while listening to the sounds of random keys being smashed releasing piano sounds. My goodness, it's people like him that really make me mad. I mean he's really grinding my gears right now. If you have a teacher like that, i suggest you just ignore them. Don't be rude though, be polite and just deal with it. They always say they're going to write you up and get you a detention, but let's be honest here, no teacher wants to do that and look like the bad guy and get hated forever. Especially the older ones. They always feel bad and usually have a soft spot unless they had like a rough childhood or something that turned them into a mean, grouchy old person, but usually that's not the case in these types of situations.
I sincerely hope that you guys never run into this problem because it can be very frustrating, believe me. I mean to try and help your friend out by giving them ideas only to get yelled at for being too loud by someone who isn't even your teacher, i mean come on now. And if you're a substitute teacher reading this, make sure you worry about your class only because that's all you're in charge of. Oh yeah, and remember to be quite in the library!