Team kill

[DeadShotKillz]

This code doesn't make any sense at all:

 hook.Add( "Initialize", "noteamkillpls", function()

	local teams = {
		[ TEAM_POLICE ] = 1,
		[ TEAM_POLICEGOLD ] = 1,
		[ TEAM_CHIEF ] = 1,
		[ TEAM_CHIEFGOLD ] = 1,
		[ TEAM_SWAT ]= 1,
		[ TEAM_SWATCQB ] = 1,
		[ TEAM_SWATSNIPER ] = 1,
		[ TEAM_SWATLEADER ] = 1,
		[ TEAM_SECRET ] = 1,
		[ TEAM_MAYOR ] = 1,
		[ TEAM_LAWYER ] = 1,

		[ TEAM_TRON ] = 2,
	}

	hook.Add("PlayerShouldTakeDamage", "PlayerShouldTakeDamage:AvoidTeamDamage", function( victim, attacker )

		if IsValid( attacker ) and attacker:IsPlayer() then 

			if teams[victim:Team()] == teams[attacker:Team()] then

				return false

			end

		end

	end )

end )

What happens is nobody can take or give damage unless they are those teams, So yeah doesn't make any sense because I looked through the code for any problems and I cant seem to find any problems with the code.