I've been wondering - couldn't you just impose a small delay, say one or two seconds, on each order - forcing everyone to wait a moment to get their order on th

I've been wondering - couldn't you just impose a small delay, say one or two seconds, on each order - forcing everyone to wait a moment to get their order on the order book. Seems like that should eliminate high-frequency trading altogether? Betting exchanges use this idea to prevent people doing time-based arbitrage on live sporting events. For example, to prevent one guy who's watching a match live in the stadium gaining an advantage against someone else watching on TV, where the pictures are delayed a few seconds.