Probably search related, but I'm feeling more FOO about it, so I'm posting here.
Don't ask why, but I did a search on Google for the exact phrase:
"LA LA LA LA LA I CAN'T HEAR YOU"
I know, you want to know why.
In any sport, if there are rules, customs or traditions -- I want to know them up front.
I wanted to know if it was proper etiquette to use five LA's for full initial conversation blocking -- and then I believe you simply say "LA LA LA" each time the other person attempts to speak, (until one or the other either gives up, or an ambulance or police vehicle arrives).
Anyway, Google reports 1,300,000 results, and was willing to show me the first 450 before the similar results message appears, (I guess you can only say the phrase "LA LA LA LA LA I CAN'T HEAR YOU" so many times before it sounds like the same thing, over and over).
The #1 result was interestingly a Facebook group page with 94,874 People who Like "LA LA LA LA LA I CAN'T HEAR YOU", although wall posts show discussion dropped off 6 months ago to one or two a month, and the last few had no replies -- ironically.