Warn about game variant

[suzyoba]

Please clearly indicate when the rules are not standard.
Highlight with a red background (like the warning for players that are new/leave games/other people dislike)
The warning should be on both join screen and game screen.
Right now it's very easy to miss/ignore the fact that you join a game variant, and once in the game there is no way to tell which variant if any is being played.

[Jest Phulin]

For most games, once the game has started, scrolling to the bottom of the page will have a (small) area which shows the variant in effect.

But, yes, it is quite easy to overlook when a non-default game is being played. Especially when one is the last to join a table, and the table administrator clicks to start the game as soon as the last person joins. A red background may be extreme, but some other color or alert would be appreciated.