Now that Rank knives are a thing, the color sets off a new way to identify traitors ingame. With each rank knife they have a specific color. using the said knife will show who is a T or not. If I am a VIP+ and theres someone who stabbed someone else with a VIP+ knife and I am the only VIP+ then I am the traitor because it falls under common sense. as long as there was only one VIP+ playing in that round, the Spectators don't count. What I am basically trying to say are we allowed to use that as a common sense kill?
Yes, as Jabba has said-- as long as you're paying attention to all of the variables such as, if there is anyone else on the server with that rank- has anyone left who has that rank, etc, you can use the rank knife skin in common sense scenarios. This works with any rank specific skin.
If a vip+ buys the knife and dies before they can use it then leaves. I pick up that knife will it have the vip+ color or my vip color?
Not always. In rare cases if a person has a higher rank than you do and you pick up their rank knife you get the color from their rank.
As far as I know, that doesn't happen in the scene Zane and helix are describing, it only happens if the original traitor with the knife takes it out before they die.