Definitive proof that Insurgency: Sandstorm bots cheat

One of the most egregious examples I have of the bots being cheating pieces of shit in Sandstorm. This is why I laugh when some mouth breather on Reddit says, "Just pie your corners and the bots are easy." Well watch my buddy get domed through a wall by a bot even though the bot has zero line of sight to him - the bot walks through the door, locks onto his head through the wall, and headshots him all within a second. I don't mind challenging bots; my friends and I wreck 90% of the time. But in a game where death means you have to sit there spectating morons for three minutes, you want your deaths to be fair and make sense. A majority of the time it's cheap bullshit like this making the game incredibly hard to enjoy.