while most NPC's follow some sensible logic, like pirates only attacking if they find you're carrying cargo, there are the odd rare psycho NPC's that are just out for blood. these are not the norm but they do exist.Ok I calmed down a bit and went back. I didn't know that there were democracy/high pop locations with low sec. I never saw it on the system map at all. Might be an idea to highlight it in a different colour - green for high, red for low etc. I'm afraid I thought it was like the original Elite. I found a High security system with one industrial and one agricultural port and I'm now trading between them. Got myself back up to 70K and haven't been interdicted (yet).
I'm staying away from all non high sec in this crate that's for sure. Is good for a doorstop I guess.
you can only be interdicted if the hostile is behind you. so when you enter a system fly off at an odd angle so your radar will be clear of any normal traffic as you approach your destination. NPC's will travel straight from the star to the station, if you are off that beaten path then the only ship flying round behind you will be a hostile one. if you have plenty of fuel you could turn round to fly at them giving you more time to work with and then select a new system and bug out. that will reset the old system so when you return the killer NPC wont be there. sure another might spawn but as you've found in high sec systems, being interdicted is rare.