Anyone else gets terrible lag spikes when people connect/disconnect/chat to you?

And why on hell id doesn't allow you to disable in-game notifications/in-game chat? It doesn't make sense to have people talking to you, specially during duels, thats why spec is muted by default.
Can't id realize it's the same for the friendlist?

How ridiculous is seeing private chats on streams because casters can't mute their friend lists? Let alone the constant influx of distracting connected/disconnected notifications. Amazing.