I'm writing today for support, feedback, and clarification on an issue in my Shadowrun game that has been bothering me of late. In game-time, my group started their careers as Shadowrunners two months ago and so far they've been hired for four fairly short missions: a get-in-get-out robbery, investigation of a kidnapping, a live-animal heist, and helping a group of moving targets get out of Dodge. They've also botched an assassination attempt, but that was retribution rather than biz-as-usual. During the course of these events the 'runners have been in at least half-a-dozen gunfights, and have dropped about a dozen security guards, mob soldiers, and gang-bangers. They've been pursued by the cops twice, and in both cases they've escaped with the use of fancy driving (speed, cornering, knowledge of alleys and side-streets) and a handful of well-placed shots that put police cars and a helicopter out of commission. They've never killed a Lone Stars officer and they've always altered the look and AR tags of the associated vehicles after the escape. They have, however, discharged automatic weapons, grenades, lethal magic, and--most recently--a LAW in relative view of the public (mostly near-Z level neighborhoods or away from urban areas, save for once where a 'runner's middle-lifestyle apartment was blown up by angry cultists).

Are they playing it fairly smart, or are they taking risks they shouldn't get away with?
Am I being too soft on them? Should they be hunted men at this point?
If I need to change my behavior as a GM, what can I do to introduce adjustments in Law Enforcement slowly?