Shaco and Heimer... What was I doing wrong?

Today while playing as Heimer with a Shaco on ARAM, he kept repeatedly abusing me, right from the start of the game (hadn't even started battling). I figured he didn't like me using my turrets near his boxes, and after the first time, I stopped using my turrets anywhere near his boxes. But he didn't want me to use them anywhere else either, because the abuse didn't stop.

After that, I was basically useless because I could only use w, e, or auto attack, and Heimer relies on his turrets. I don't even know what was going wrong. Since I was 3/1/16, it could not have been that I was feeding.

There was no explanation for his anger, but I would like to know if there is some reason why Shaco would have problems with Heimer's turrets. Any guesses, anyone?

I thought putting the first turret in the brush next to his box was actually a good thing. With a box and a turret together, they would go for my turret and get feared by the box. Did I maybe reveal his box? I would think a hidden box would stay hidden whether there is a turret there or not.