How can I make the Classic Roblox Slingshot not team-kill? [closed]

I am stumped. I played the slingshot with a kills leaderboard and it doesn't register kills. That is not what I am worried about but it probably ties in with my problem. You are able to kill members of your team with the slingshot and I want to stop it. I tried making the pellet color your team color and if it touches a player with the same team color, it won't do damage. It didn't work at all and I discarded it. For reference, here are the relevant slingshot scripts:

Pellet Script:

local debris = game:service("Debris")
pellet = script.Parent
damage = 8

function onTouched(hit)
    if not hit or not hit.Parent then return end
    local humanoid = hit.Parent:FindFirstChildOfClass("Humanoid")
    if humanoid then
        tagHumanoid(humanoid)
        humanoid:TakeDamage(damage)
    else
        damage = damage / 2
        if damage < 1 then
            connection:Disconnect()
            pellet.Parent = nil
        end
    end
end

function tagHumanoid(humanoid)
    -- todo: make tag expire
    local tag = pellet:FindFirstChild("creator")
    if tag then
        -- kill all other tags
        while(humanoid:FindFirstChild("creator")) do
            humanoid:findFirstChild("creator").Parent = nil
        end

        local new_tag = tag:Clone()
        new_tag.Parent = humanoid
        debris:AddItem(new_tag, 1)
    end
end

connection = pellet.Touched:Connect(onTouched)

r = game:service("RunService")
t, s = r.Stepped:Wait()
d = t + 2.0 - s
while t < d do
    t = r.Stepped:Wait()
end

pellet:Destroy()

Slingshot Script:

Pellet.LeftSurface = 0
Pellet.RightSurface = 0
Pellet.TopSurface = 0
Pellet.Shape = 0
Pellet.Size = Vector3.new(1,1,1)
Pellet.BrickColor = BrickColor.new(21)
script.Parent.PelletScript:Clone().Parent = Pellet

function fire(mouse_pos)


    Tool.Handle.SlingshotSound:Play()

-- find player's head pos

    local vCharacter = Tool.Parent
    local vPlayer = game.Players:GetPlayerFromCharacter(vCharacter)

    local head = vCharacter:FindFirstChild("Head")
    if not head then return end

    local dir = mouse_pos - head.Position
    dir = computeDirection(dir)

    local launch = head.Position + 5 * dir

    local delta = mouse_pos - launch

    local dy = delta.y

    local new_delta = Vector3.new(delta.x, 0, delta.z)
    delta = new_delta

    local dx = delta.magnitude
    local unit_delta = delta.unit

    -- acceleration due to gravity in RBX units
    local g = (-9.81 * 20)

    local theta = computeLaunchAngle( dx, dy, g)

    local vy = math.sin(theta)
    local xz = math.cos(theta)
    local vx = unit_delta.x * xz
    local vz = unit_delta.z * xz


    local missile = Pellet:Clone()




    missile.Position = launch
    missile.Velocity = Vector3.new(vx,vy,vz) * VELOCITY

    missile.PelletScript.Disabled = false

    local creator_tag = Instance.new("ObjectValue")
    creator_tag.Value = vPlayer
    creator_tag.Name = "creator"
    creator_tag.Parent = missile

    missile.Parent = workspace

end


function computeLaunchAngle(dx,dy,grav)
    -- arcane
    -- http://en.wikipedia.org/wiki/Trajectory_of_a_projectile

    local g = math.abs(grav)
    local inRoot = (VELOCITY*VELOCITY*VELOCITY*VELOCITY) - (g * ((g*dx*dx) + (2*dy*VELOCITY*VELOCITY)))
    if inRoot <= 0 then
        return .25 * math.pi
    end
    local root = math.sqrt(inRoot)
    local inATan1 = ((VELOCITY*VELOCITY) + root) / (g*dx)

    local inATan2 = ((VELOCITY*VELOCITY) - root) / (g*dx)
    local answer1 = math.atan(inATan1)
    local answer2 = math.atan(inATan2)
    if answer1 < answer2 then return answer1 end
    return answer2
end

function computeDirection(vec)
    local lenSquared = vec.magnitude * vec.magnitude
    local invSqrt = 1 / math.sqrt(lenSquared)
    return Vector3.new(vec.x * invSqrt, vec.y * invSqrt, vec.z * invSqrt)
end




Tool.Enabled = true
function onActivated()

    if not Tool.Enabled then
        return
    end

    Tool.Enabled = false

    local character = Tool.Parent;
    local humanoid = character.Humanoid
    if not humanoid  then
        print("Humanoid not found")
        return 
    end

    local targetPos = MouseLoc:InvokeClient(game:GetService("Players"):GetPlayerFromCharacter(character))

    fire(targetPos)

    wait(.2)

    Tool.Enabled = true
end

script.Parent.Activated:Connect(onActivated)

Client Script:

local Tool = script.Parent

local MouseLoc = Tool:WaitForChild("MouseLoc")

function MouseLoc.OnClientInvoke()
    return game:GetService("Players").LocalPlayer:GetMouse().Hit.p
end