I had this happen early in my career. Recruiter and I talked about a range, went through 3 rounds of interviews, and I got an offer below what I was currently making. Absolutely not in the discussed range. The offer came via email and I was insulted - I declined without negotiation. I still have the email, and I was apparently pretty polite. A week later they pinged me back to ask if I had considered it, if I was dissatisfied and that they could go up. I just politely restated my decline. They'd already wasted my time, and as junior as I was, my time was still valuable - I took time out of work, traveled, etc. That was almost 10 years ago and I'm still salty about it. That should tell you what kind of impression this behavior leaves behind. Looking back at the emails now, I am very surprised at how professional and polite I was about it - my memories of 20-something me are apparently overblown :)