Because Cops will hardly be alone
As soon as they start a fight, it would be more than logical for the Cops to call for Reinforcement
More and more Cops will appear, Mages, Drones,etc
than it'll develop into a Chase and beginning Chars have hardly a Chance to escape especially if you have beginning Players who don't yet know the SR-World and even if the Chars manage to Geek the Cops before they can call for Help there will be automatic surveillance (from the Copcar, from cameras, drones,etc).
so they'll be in ...."deep shit" (is that the right Word ?)
with a Deep Dance
Medicineman