I had 25 spectators watching my game!

#7 #5 If you have addblock (or ublock) installed you can right click it and select block this element. After you end playing you can unblock it... or turn on and off the blocker on lichess.

#8 ofc

#11 ah, that might be an idea. Maybe I'll try that ;)

Here's a Tampermonkey(for Chrome)/GreaseMonkey(for Firefox) userscript :

http://pastebin.com/bif4eLws

It offers options to hide the spectator window, to hide the entire chat window, or just to hide messages that come from users (so you can still see takebacks, draw offers, etc)

If anyone encounters any problems, let me know!

thx #11 :)

#12 It doesn't matter :(
Some funny person suggested FM meant female master.....Now I know it means FIDE master.
I feel cheated. I thought you and I had a connection, what with our funny names :(
I just hope you lose your next 10 games.
:D

#5,7... etc.
At least for me, the problem is that a large number of spectators makes the page longer than the height of my screen and chrome adds a scrollbar. Then a couple spectators leave and the page fits again so chrome removes the scrollbar. Whenever the scrollbar appears the page shifts slightly to the left and when it leaves it shifts back to the right.

I wrote a really, really simple Stylish script that hides the scrollbar during games and while watching Lichess TV. The board will never shift with lots of spectators because they won't cause the scrollbar to appear. Someone with more knowledge of web design can definitely come up with a much more elegant solution, but I'll offer this up in the meantime: userstyles.org/styles/120935/hide-scrollbar-during-games-on-lichess-org

This solved my problem with lots of spectators wiggling the board, so if the other posters are experiencing the same issue it should work for them as well.

#16, I'm a web developer, and that's actually a much more elegant solution than mine.