This is what I've done since but I was inexperienced and naive the first couple states I lived lol. But they are relentless! Every single time I go they typically ask for email or phone so it's happened where I'll remember not to give it for most of the time but will randomly slip one day after donating cause I'm a moron. I've also had several places that somehow got my number and I swear I've never given it to them. I have no clue how they obtained it. Probably from my email or something. The place I'm currently at I have given a fake number and email so far and it seems to be working but they do ask to send confirmation emails for appointments which causes some issues so I've just been going when my wife goes and seeing if I can get in then or just make an appointment in person. I'm sure they'll pry it out of me at some point 😄