Currently, there is a player on PC EU who has a pretty terrible connection, to the point that he can shoot you when you're behind cover and damages you for a solid second after death. This is clearly a 1000+ Ping player.
Now, playing against these players makes for a pretty terrible experience, since dodging grenades becomes impossible, knowing whether or not you're truly behind cover is pure luck and in direct combat you never know whether they're firing or reloading.
My suggestion is the following: keep players who have 500+ Ping off the server. There are multiple server and if someone picks the correct region and plays with a remotely decent internet connection, they should easily have at least 300+ Ping at worst so it wouldn't alienate anyone unless they deserve to be kept away from PvP.