I'm always hesitant to add numbers to my phone's block list because they spoof numbers often and I'm worried that I'll block a number that legitimately needs to

I'm always hesitant to add numbers to my phone's block list because they spoof numbers often and I'm worried that I'll block a number that legitimately needs to reach me in the future. I know the chances are tiny but it would be a huge PITA to debug that issue and if they do reach me through some other means I doubt I'd remember to check my block list to see if I happened to block them in the past.