Aw hell, I was just writing a reply and I can't remember exactly how I used them.

Regardless, I never had a problem and I think those threads are mostly outdated.
I think I used fire at will at first, but changed it to forward fire only on the Conda. Then I'd have my main guns in one fire group, and combined with the turrets in a second. If I needed the extra firepower, I'd switch to the combined group. One thing I was careful about was switching out of turrets if I saw a friendly crossing my path, as the turrets would keep firing when I stopped pulling the trigger. But I also remember using fire at will and letting them handle a swarm of smaller fighters on their own.
Anyway, I did find them pretty useful on the big ships, but I think you do need to be careful about friendly fire. I don't think you need to worry about them opening up on someone in front of a station and having the station blow you apart.