Check out how a foreigner quickly withdraws 300 $SOL in just 30 seconds

I think whether it's a cow or a passive P rookie, such characters are inevitably present in the blockchain ecosystem. If someone else doesn't take the bait, others will. If you don't like it, simply don't participate. No matter how harsh your words, you can't eliminate this phenomenon, because it's just part of the blockchain ecology.

Also, don't think foreigners are more gentle. I believe foreigners employ more tactics and are even more ruthless. The current trench gameplay on BNBChain seems to be leftovers from what Solana used to do.