I know you don't tell Valve or Steam what to do--but I thought you might have some official understanding. Playing offline and single player sounds pretty safe and makes sense if there is any to be made. And it's probably true that you don't want to mix the two up--once you use the trainer offline in your single player game and make a save game don't play online without the trainer using that saved game. But I don't track this from VAC.
The only way is to play in offline mode. Also you know that there is risks when you are using a trainer or 3rd party program cheat with.
been using them for years now, all in online mode (sp only) for hundreds of games, never had prob with VAC or ban on my acct.
Same here, cutie pie. I never go into offline mode and I have yet to find a multiplayer I can stand for more than 10 minutes. In effect, I only play single player. Never had an issue. So no grumpy cat face here when it comes to VAC. Hell I don't even know what VAC is.