[Question] What is the safest way to play a game that uses a modded Steam_api.dll to avoid getting banned?

Hypothetically, if someone were to download a Steam game from FG what's the best operating procedure to avoid being Steam banned? For example, I understand that steam_api.dll will often be quarantined by MS Defender because the game uses a modded version of that file. Once it's restored what steps would you take to proceed? Log out of steam? Disable internet access? Kill all Steam processes?