There are three things in highsec:
- faction navy for chasing people with low empire standings
- faction police for chasing people with low security stations
- CONCORD police for killing criminals instantly
The CONCORD part would never change
However if you have high militia rank (which takes a long time to achieve) then you would be left alone by the faction navy and faction police within your own empire only. The other militia and pirates will still kill you non stop tough since you are in eternal war.