I don't think it's possible to block Freecam, unless there's some private mod that managed to find a way to do this. Freecam is client-side, so the server cannot tell you are changing locations. Do you have a screenshot of the warning/sign?
@dyiing No. Only your client. They cannot give me a ban since there is no direct evidence. Therefore, they decided to just ruin my game on the server so that I log out of the game myself. The server is 100 players and it is cool, there are no lags if you play honestly. I have used Freecam sometimes. I don't know how, but they just create all sorts of lags for me. If I now go from the old account to the server, then everything will start over. Karoch, apparently there is no way to play with the cheat.
@alexfoxyboy In aristois, skins are not shows. Atleast not for others. Only the people with an official launcher. though, if you have a skin, its probably shown.
What i am trying to say is... Your skin might be shown to other players but not to you.
If your playing with a person who has an official launcher, his skin will be showed. I think.
It's most likely an OptiFine issue though. I would follow this: https://discuss.aristois.net/topic/13/how-to-uninstall-optifine-optifine-error-on-startup
There's a "Microsoft" account button in the alt manager, you should be able to use that to switch to a Microsoft account and retain your donor perks.
It's not possible to switch between alts like you can with Mojang accounts, due to the authentication required to log in to Microsoft accounts. So unfortunately this will not be added to "Saved alts", as there is no way to do it.
Sorry, I'm not sure what you mean by a whitelist to add players. You can add people to friends list with .friends add
For combat mods, any friends will not be attacked if "attack friends" is disabled.
Combat entity whitelists are within each mod. You click on where it says "Entities".