[Loki]

I usually give people 30 mins. If they've hit me or a gang member within that 15-30 minute window, though, I consider them fair game to take down at 15 mins on the nose (and will make a point of catching them right at that 15 minute mark).

0-15 minutes, red light
15-30 mins, yellow light
30+ mins, green light

is kind of how I see it.