[ateng]

Could you delay the large screens, commentaries, and live broadcast by 3-5 seconds (or more) such that any information gained from leaked noise would have minimal impact to the players? This would make ANS headphones viable

[xxs]

5sec would be way too low for anything meaningful. One of the more pronounced cases, where the audience reacts, is 'smoke' which makes the players invisible until they are close to opponent player (or tower), used in a way to initiated a gank. The 'smoke' last 45seconds. Killing a big NPC (Roshan) is another example as it takes time (and usually more than a single player) to down it. Other cases: buying a rapier - very high damaging and expensive item but it does drop on death - so it's a warning sound, that may take minutes between a conflict and used.

Sound proofing however still doesn't solve the issue as it doesn't deal with the vibrations in the venue. Pro players have commented that if they start feeling vibrations while 'farming' alone, they become more cautious - asking a support player to cover the gank or move to a safer area.

[ufo]

translation: gank = ambush, farming = collecting resources without engaging against the enemy team

[eterm]

This isn't feasible.

Riot tried this with League of Legends and the result was that you'd get players jumping up celebrating 30 seconds before the audience saw the nexus falling, which was incredibly anti-climactic.

Imagine if you were watching tennis and halfway through match point you suddenly see the player celebrating.

To be fair, most of the time it's GG well before the nexus actually falls, but it's sometimes meaningful, and it still ruins the moment to have that sudden de-sync effect as you see live players reactions before you see why on screen.

As a result, as far as I know Riot abandonned having any meaningful and deliberate delay (There's still some technical delay natural to broadcasting).

[tetha]

This was an entirely weird thing at the last soccer world cup, or the one before that: TV via Satellite, Video streams and TV via DVB-T had different transmission delays, with up to 15 - 20 seconds of delay between them. As such, the people across the street started cheering first, then the goal would show on our screen and a bit after that the people across from the balcony out back started cheering.

[dubcanada]

No, as another comment said this doesn't work in Dota 2, sometimes it can take 15-30 seconds of gathering before you trigger an action. And if you know X hero is in the fog of war you can easily gain an advantage. Or if you know X hero is jungling or stacking creeps or what not. There is just too much information you can gather from being able to see the enemy.

[CyberRage]

some information can be viable for longer than that, there are some extreme cases where 2~3 minutes would not suffice