Whether we "should" or "shouldn't" is currently irrelevant. We do.

We don't need self-inflicted guidelines telling us that when our friends need to "wc" we should oust them. Now, strangers, I agree. If someone I didn't know tried to leech for more than 1-2 min off my party, I'd oust them. It's just that there are some people who I have an arrangement with. We always stay within 3 levels of each other. We level everyday. We don't worry if someone needs to study for a test or do their laundry. We get the job done with them in tow.

Anyway, my point is you can think "this shouldn't be!" but it is.
You can tell SE how you think. If they agree with you, it will change. If they don't see it as harmful, they won't.

They are the ones who make the call, though. Not players around me.