Try to delete your account on LinkedIn. (Waiting for the gasps of horror to die down.) I did it. You have to contact LinkedIn via their website. Then wait for a representative to contact you by email. Then tell them you want to delete your account. Wait for response. Then send them a photograph of your drivers license (with the important numbers blacked out in a photo editing app) to prove you are who you are. Wait for response. Finally get account deleted.
I didn’t have to prove who I was to join. It is ridiculous.