Global arrows and circles while observing games

It will be very fun to draw arrows on the board, that other spectators could see too.

For example: live chess event, 2 top GMs playing each other.
A lot of spectators watching the game. They can draw their ideas on the board, using arrows and circles. It makes easier to follow moves, than just notation in the chat.
Each new spectator, that trying to draw, will get his unique color.
A control panel will be needed to switch somebody's drawings on or off, to avoid trolls.

It could be also useful for Lichess TV channels. So people could be aable not only watch, but also discuss and draw possible moves, try to predict, and so on.

Good idea. I think that will be good, but it will probably be sometime before this happens...........Perhaps in mid-2016 or later.......

I can imagine thousands of people draw something on the chessboard in the same time.

Right now the usual number of specators is far from thousands. If there will be too many, of course there should be a control panel to filter what to display. One option is filter by rating. Or show only arrows that draw by your team members, just to analyze with friends that are in same team.