This is EXACTLY what I have been doing. Laser show in the distance? Boost towards it, quick K-Scan...kill...repeat.
I've made 3 million since I started here. I dont know about pirates though...I've just been mindless killing everything in my viper. It SUCKS to hit a security by accident and get a 200cr bounty then every stupid sidewinder mining an asteroid stops and comes at you. I just clear the asteroid ring and warp to dock, pay fee, cash in bounties, and repeat.
Many many many times these Anaconda's will come in with a 100k bounty and start owning the security. I deal with them by targetting their Power Core or whatever and just exploding them. I'm using these sustained beams on gimble's and I just fly around it and the lasers do the rest. Pretty easy. Don't get in front of them though that fucking plasma accelerator will ruin your day. Also dont run into any asteroids that will also ruin your day.
Other than that, find a resource extraction site in planetary rings that are in the light of the sun. Fighting on the dark side of the planet in an asteroid belt is more painful than its worth.
Edit
Its worth it to go find some really good weapons for this. What happens a lot of the time is I'll be busy killing Anaconda's and the security will be cleaning house on the 10k cr ships and lower while I whittle the big ones down. The faster you kill the more creds you can bring in.
Lasers only. Fuck anything with ammunition.