In December, I sent in a cheque for my Legion membership, which went astray. I am sure others did also.
One day, while talking to the mailperson, I mentioned this, and was told that people put their unwanted flyers in the out-going mail slot.
The mail person does not have time to sort this, so it all goes in the recycle bag – mail included.
Take your flyers home and dispose them there and quit causing headaches for others.