People who boot indiscrinantly will never want to tell you the reason! I was dealt a TEN card heart suit and when my partner and I had reached 6H doubled and dummy had come down, the host booted me, the declarer. I spent ages tracking him down and submitted an abuse report which resulted n the standard we’ll look into it answer. I’m sure the host was annoyed because I over bid his 5S call. Would he ever admit to that?! But to simplify BBO’s work, just the name of the host when you are booted would be a GREAT start and easy to implement. EG. The host, angry999, has removed you from the table.