rhouses becomes like a crackhead roaming the house, taking things out of cupboards and randomly placing them somewhere else, mumbling
Well done for allowing Grant to live with you, but that sounds a bit much to put up with.
Don’t really have a good answer on how much to limit it by, but having boundaries is definitely essential. It also robs of them of their interest in playing with toys. The oldest plays on Minecraft and things like that and have had to use the parent controls as we realised we didn’t have a clue what was going on and who he was interacting with.
Might be an idea to frame it as a reward for good behaviour rather than an entitlement. Btw, I’m saying this as a parent who has let it get out of control, so I’m probably not qualified to give advice!