In Chaos tournaments at the club, unlike the recent CIS championships, hints were officially prohibited, even when a well-meaning person wasn't physically looking at the opponent's screen.
If a judge identified someone giving hints, they would receive a warning the first time, and then be removed from the playing area.
The same can be done here; if the streaming engine allows, they can be kicked out of the chat, but first, they should be warned.
But in tournaments, especially in key matches, to maintain concentration and ensure the chat isn't disruptive, you could stream with a relay and commentary from the host-judge!
And fun matches are just fun matches)))
Wowa, I don't remember you at the CIS championship :p, but hints are prohibited in live tournaments; the difference is that the judge and his assistants must ensure this is enforced. Because usually, in live games, strong players give hints to other strong players, which significantly unbalances the game.
Javdet is absolutely right; if you agree to play with a streamer, you accept the fact that there will be hints in the chat, etc.
What does "agree" mean? Let's say you're randomly assigned to play against such a player in a tournament. Is there an option to refuse and request a replacement? :D