Well, the website implements some basic red lines about that in its rules:
https://webdiplomacy.net/rules.php wrote:4. Keep press appropriate.
Diplomacy is a game of many strategies and your discussions with other players can sometimes be hostile, impolite, and even uncivilized. These press strategies are all permissible on webDiplomacy and in Diplomacy in general. However, your press with other players should never include the following:
-Messages of sexual nature
-Overt racism or sexism of any kind
-Doxxing (revealing any real life information) of another player
This rule also applies to game titles.
First offenses will result in a warning in some circumstances but may result in a severe point dock and removal from the game in question if the offense necessitates such action. Second offenses may result in a temporary or permanent ban from webDiplomacy.
5. Do not use the software or moderators as a diplomacy tactic
Lying is fine in Diplomacy except when it gives mods/admins unnecessary work to do!
Falsely accusing someone of being a multi-accounter/meta-gaming to rally others against them in a game, or claiming that your orders didn't come out the way you entered them to cover up your motives, means mods/admins spend time looking for cheaters/bugs which were made up.
All accusations against other players must be made directly to the mod/admin team directly as specified below, in private, for this reason, and software bug claims must be genuine, even if only told to another player. Avoid making cheating accusations in game, via pm, or on the forum.