When they say they have seen me before but their number is not saved in my phone = red flags. Had 2 in 2 days say that and both were blocked previously, both for being timewasters. I put the phone down on one because he failed screening, I thought to myself, I need to stop being so hard on them, then he emailed me on AW and I realised my gut was right as he was abusive when I saw him a few years ago. He's tried to book me multiple times.