It’s quite silly if you think about it and why they haven’t done so ages ago. I mean autorun kind of indicates you are going somewhere. If the game detects you run in place for more than 3m or something, it should just kick. Lag doesn’t last that long nor does looking at your inventory and accidentally running into something.
As to above stating there is a legit reason to do it, that’s absolute nonsense. You want to afk, just do it. The timer is what, like 10-15m already?