"サングラスを室内でかける人は誰だか知ってる？盲目の人と嫌な奴。"

Simplified Meaning:

When people wear sunglasses indoors, it usually sends a strong message. Blind people often wear sunglasses inside to protect their eyes, which can be very sensitive. However, when someone who isn't blind does it, it can come off as rude or as if they're trying too hard to look cool. It's like they're saying they don't care about social norms or how others see them. This can make others think they're arrogant or disrespectful. Think about someone at a party who refuses to take their sunglasses off, even though it's dark inside. This person might think they look trendy, but most people around them probably find it annoying. Wearing sunglasses inside when you don't need to can make you seem rude or out of touch. It's a small thing, but it can have a big impact on how people see you. So, if you want to be seen as polite and respectful, it's usually best to take off your sunglasses when you're indoors.