I think it's important to go into an interview with the mindset that I am interviewing them as well as they are interviewing me. Why give them a reason for withdrawing an application if they don't ask for one? If they ask for a reason, it starts to become a negotiation.

I’m saying I’ve already interviewed them and I don’t want to work here, because they’re nuts/toxic. Do I tell them that at 1:15 and go grab a fancy coffee, or do I let them finish the interview?

How many people really remember someone they interviewed at another place four years ago?