Abrupt stop in communication

Hello. Recently I’ve had several potential exchangers abruptly stop communicating. They go silent on the other end. I’ve sent follow-up messages but still no response. Are people really that rude or is something else up, a compromise in the system perhaps?

No problem in the system in theory. It’s probably ghosting

Thank you. Is ghosting common? What happened to manners?

It happens sometimes yes unfortunately.