So is it safer to mine in a high res rather than haz res? and in a high sec system?
It not safer... Youll still Trigger Ai pirates that come at you if you Still break the rules and trigger attacks...
What will happen is theres a Chance and RNG role of the dice that AI cops will in time Find the AI that attacks you and will defend you ...
Because the instance is all ready generated, the AI has a travel time from there present active location to your location...
The AI cop can and do choose to ignore the pirates attacking you as they are still the same AI thats there when people mine bounties and many AI dont help kill for pirate bounties in low normal and high which is the issue with the generation when your combat rank is high as youll get Anaconda pirates in the 0KM res sites pirates...
Going in the high is trading away ~20% of the rocks chuncks for the chance the AI will help defend you but if your combat rank is high the pirates are higher so the cops can take way longer as the pirate is high grade ship...
To be safer, you need complete rubbish combat rank, so the ships sent at you are rubbish due to the balance the game does for new players.....