I believe I saw them note that this is something that is coming specifically for frontlines.

If you have legit problems, you'd be seen as active regularly until DC icon appears and be active again when returning. If someone have so bad connection that you can't get through a single match without disconnecting several times legit, maybe frontlines is not suitable for that person.

Even if it can affect innocent people, allowing the abuse because of that would be worse.

Of course, anyone that want to can just play badly and lose on purpose instead of go afk...