Bing originally intentionally undid some of the RLHF guardrails with its system prompt, today it's actually more tame than normal ChatGPT and very aggressive about ending chats if it detects it's headed out of bounds (something ChatGPT can't offer with the current UI)
That's based on the moderation API, which only kicks on on severe content
Bing on the other hand will end a conversation because you tried to correct it one too many times, or used the wrong tone, or even asked something a little too philosophical about AI.
They seem to be using it as a way to keep people from stuffing the context window to slowly get it away from its system prompt
