yosup.app and other web-based nostr clients need to implement some sort of blocking or filtering. The public timelines are overrun with bots and spam ( thanks to people like @f9074000a5865431b037b3b760d10129a53167b50e90e5b116a1aebb14d0099b ). Ideally, the filters should be under users' control, but a simple "don't display posts when an identical post came through within ten minutes" would also help.