Get a grip!!
Some speedway fans do really live in their own fluffy little world. Quite sad really.
Riders fall off, people cheer and are pleased when it gifts their team points and possibly the match. It's a normal human reaction.
Nobody really wants to see them hurt, but when riders slide off at the back unopposed, most fans, riders and officials will be pleased if their team gains from it. Nothing wrong with that in my book.
This is competitive sport for christ's sake, not a school sports day - 3 cheers for the winner and all that mallarky.