Dunning kruger effect.
We all understand that nullbears use local to see when it is safe to rat. That’s established even with you i hope.
So right now, a player logs in, checks local and if it’s clear he goes to rat and make some iskies. If its not clear he logs off and comes back an hour or two later. It’s still not clear. So he logs off again. Comes back after four hours. Still not clear. What does he do? He doesn’t know if the neutral in local is afk or not. So if he undocks there is a risk. (important word)
Under your suggestion where an afk cloaker gets logged off after so much time things work differently. Lets say afk players get logged off after one hour of no input.
The same nullbear logs on. Sees a neutral in local, and thus logs off. He comes back in one hour and fifteen minutes and he sees the same guy in local. Now he knows that if that guy had not input anything after an hour he would be auto logged off. So the fact he’s still there fifteen minutes after the fact tells the nullbear with no uncertainty that the camper has been at his keyboard within the past hour. No uncertainty. No risk.
Another example. This time it is actually an afk cloaker who stays logged in before going on an 8 hour shift.
So with the current mechanics;
The null bear logs in. Sees the bad guy, and then logs off. Come back in an hour or so. Sees the bad guy again and so logs off again. And so on and so on for maybe 24 hours. The whole time the nullbear doesn’t know if he’s actually there or not. Risk.
But under your mechanics, the camper disappears after an hour and the null bear gets 7 hours where he knows hes safe because no one else is in local. No uncertainty. No risk.
Nerfing afk cloaking provides safety for nullbears. And they really don’t need it. They are doing just fine despite all the afk cloakers. In fact, the rewards from null are so huge that ccp don’t want to nerf afk cloaking without somehow balancing Nullsec risk/rewards at the same time. Which is why we’ve had this situation for so long.
You see, we DO understand how null works. Much better than you it seems.