I'm thinking of making fun of my classmates who are too poor to buy brand name clothes.
Why are you making fun of them for being poor?
I checked the wiki and checked the different brands. I still think they're poor
You shouldn't make fun of people who you think is poor. What if they just don't like buying expensive clothing and spend that money on something more important.
I'm even thinking of checking their bank account details to prove I'm right.
I don't think you should care so much about if people are poor or not. It's not really anyone's business to know.