The killing_spree_meepo_ann_kill_wicked_02_02 response is hooked up 3 times the dire player team, instead of once each for Radiant players, Dire players and spectators.

Code:
Response announcer_dlc_meepo_killing_spree_CustomIsKillMessageIsSevenSpreeChance_15%IsPlayerTeam_DireIsAnnouncerKillingSpreeVoice_Meepo
{
	scene "scenes/announcer_dlc_meepo_killing_spree/announcer_dlc_meepo_killing_spree_meepo_ann_kill_wicked_02_02.vcd" nodelay noscene 
	scene "scenes/announcer_dlc_meepo_killing_spree/announcer_dlc_meepo_killing_spree_meepo_ann_kill_wicked_02_02.vcd" nodelay noscene 
	scene "scenes/announcer_dlc_meepo_killing_spree/announcer_dlc_meepo_killing_spree_meepo_ann_kill_wicked_02_02.vcd" nodelay noscene 
}

Rule announcer_dlc_meepo_killing_spree_CustomIsKillMessageIsSevenSpreeChance_15%IsPlayerTeam_DireIsAnnouncerKillingSpreeVoice_Meepo_Rule
{
	criteria Custom Isannouncer_dlc_meepo_killing_spree IsKillMessage IsSevenSpree Chance_15% IsPlayerTeam_Dire IsAnnouncerKillingSpreeVoice_Meepo
	response announcer_dlc_meepo_killing_spree_CustomIsKillMessageIsSevenSpreeChance_15%IsPlayerTeam_DireIsAnnouncerKillingSpreeVoice_Meepo
}
The line currently does not play for Radiant and spectators at all.