> You've wasted 500Mb of bandwidth.

Yep, it sucks, but on the positive side, I'm feeding 500Mb of garbage into them every day and that feels like enough of a small win for me.

> My monthly b/w cost is now around 20-30Gb a month given to scrapers [...] 1-2Gb a month

That definitely sucks.

> Do I go offline or let it continue?

Might be time to start blocking entire IP ranges and ASNs and see if that helps.