Fortunately it's far less popular in the UK - indeed I watched it before any of the hype started, but I get what you mean. I have the same issue with watching F1 - I usually don't watch it until afterwards as my girlfriend and family have no interest, so I watch it when I get a chance rather than annoy everyone with it. But blurting out the result (even when it's not been on live on terrestrial TV) seems to be the thing that news readers do; if it's football they warn you - anything else, TOUGH!