And if your cell phone ends up in their list, woo-ee they will call you at 11pm on a Sunday if it means you're more likely to pick up. It would have panicked me to get a call at 11pm at one point in my life, but thanks to recruiters I just never answer the phone at all. Voicemail is my butler.
In the US, there are laws against calling after 9:00. And like you, I don't answer calls from unknown numbers any more, whether or not my phone identifies it as likely scam.
