I do not believe in the "bystander effect" as it is stated, because for a larger group you have more of a chance of having one person that does not kowtow to peer pressure.

So, although more sheep in one place the more likelihood that no sheep acts, but we are not all sheep.

And, once two people act, all act.

Lastly the Queen's incident may have many other problems. It could have been that this time, one of her Johns was too rough. That the people in this area got to hear her cries regularly.

You know, when you hear a loud argument and the sound of crashing... then find the guy kicked out... but next week the same guy is back, and the same thing happens again...