They do communicate clearly what is essential, that's why they write the technical rider. When they band shows up the people at the venue act like everything i

They do communicate clearly what is essential, that's why they write the technical rider. When they band shows up the people at the venue act like everything is OK. The band needs a quick way to assess the attention to detail of the venue staff. The brown M & M's are just one way. There were multiple similar items also in the rider, it wasn't just the M&M's, that were used to estimate the attention to detail and competency of the venue.