Yeah, the AI definetly has a grudge against the player it seems. I've had a whole tank turn around and start blasting at my hiding spot, when I was just a usless half dead sniper, completely ignoring my dozens of allies who were right in the open. Just a tad unrealistic in my opinion.
And I've seen the sniping thing too occasionally, at other times they go spastic and start rolling and straffing in completely random directions.
Not being paranoid doesn't mean someone isn't trying to kill you... or does it?