How many times have you seen an incident at the barriers(eg your runner being kicked by another runner...etc), coincidentally, often involving the favourite or one of the fancied runners. After a brief inspection most are allowed to run...and to the chagrin of most punters, invariably they run "down the track."
In my opinion.....if in doubt......they are out!
Sure, punters will be disappointed but at least they have their money back!
The justification for this stance is that prior to being put into the barrier, most horses are "worked up,"(especially the younger ones), adrenalin pumping through their veins and after receiving an injury or a "knock" they basically don't feel it at the time but it could have a detrimental impact on their performance in the race. Most serious injuries are only diagnosed after the race when the particular runner is found to be lame or even worse.....in the meantime the poor suffering betting public have "done their money" again!
An analogy is in football when a player receives a bad knock and believes that he is capable of carrying on playing. After the match he is found to be severely concussed and was in "lalaland" for much of the match. In my opinion it is similar in racing and to retain the betting public's confidence, any such horses(ie. under a potential injury cloud) should be scratched and all monies be refunded...to err on the side of caution. Or do the various TAB's not want this to happen, as it could affect turnover?
Any opinions or have you experienced similar situations?

Cheers.