All mods affect games..
And its especially dangerous modding a game with constant uploads and downloads of stuff, imagine if a moded creature editor would produce a creature, upload it and send it to the PC of someone who doesn't have the mod, the following would appear:
"ERROR! Could not open file fakefilename.dll. Would you like to send a report?"
Then the game would always crash until you either remove the downloaded creature manually (Go to files directory and delete all of its creature files), Reinstall the game or get the same mod (even if you don't like it). In games like this I'd rather see no mods at all, unless a completely different download server is opened for modded stuff, I'll just have to turn off the automatic download thing..

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