I think I’ve probably only ever been blacklisted once in my entire career, and it’s because I looked up the reviews of a company I applied to and they had some very concerning stuff so I just ghosted them completely and never answered their calls after we had already begun to play a bit of phone tag prior to that trying to arrange an interview.

In my defense, they took a good while to reply to my application and they never sent any emails just phone calls, which it’s like, come on I’m a developer you know I don’t want to sit on the phone all day like I’m a sales person or something, send an email to schedule an interview like every other company instead of just spamming phone calls lol

Agreed though, eventually they will forget, it just needs enough time, and maybe you’d not even want to work there.