Often when visiting someone's home street I see that their milk &/or meat collectors are full - sometimes multiple collectors. Maybe the owners are off-line for a day or two.
I wonder if they couldn't have "dedicated" SDMs that visitors could "empty" the meat/milk into so they would continue to collect. The SDM would hold far more (Maybe the present collectors should be replaced with SDMs?) I am not suggesting this as a visitor collection - it would stay on the street for the owner. It just seems neighbourly. Perhaps there could be a small iMG or drop reward for doing this.