Hey hey, idiots!

Five dashes in three phrases = too many. 

File under, "Notes from Captain Obvious." 

Translated, this note actually reads, "You and Norm are slobs. Please take the recycling down when it's too full, wipe down the counters when you eat late-night food and even though the plants are not yours, please don't pretend you can't see them and water them occasionally and more often than that cactus you killed once by putting it in time out against the window for a year and a half." 

They don't know about the cactus, but this version is still more honest than the one above.