It could tell them there’s likely a live person receiving their bullshit, so continue spamming with other means.

Bear in mind these are all just ideas I have about how they operate, based on nothing really. I try to imagine how spammers analyze data they receive to target us.

Edit: In italics

I always block them right away. My idea is that any interaction flags you as ‘positive direct contact’ in their scumbag networks, making them likely to increase the spamming. I realize the act of blocking may in itself trigger this, if they track undeliverable contact, but idk what else to do.