Street smarts, my guy.. street smarts...
Okay sure if you get mugged by whiteshirts, it becomes incredible difficult to find out who they are with very limited information, especially if they're masked up [...remember street smarts? your gut should be yelling at you at this point if a whiteshirt is following you masked up].
White shirts also dont pop out of no where... if you're a target, they've either been scouting you for a short while and you just didnt perceive them, or they're driving around in a late 2010s hyper car and just hot drop on your ass.
At this point prevention, ICly, is the biggest thing that can help and Street Smarts.