Is there a way to stop un-active sims from collecting things?

It is the mod which is causing the sims to collect things. I am not playing with NRaas' SP at the moment and don't know off-hand if there is a setting which will stop that behavior. Although, Twallen was very throughoro in his mod features so I image there has to be a way. If not, the best thing you can do is sell or delete the objects (NRaas Purge).

In an unmodded game, the townies don't collect any items at all.