How to make people put garbage bags into trash cans?

You can write some humorous warnings on or near the trash can, and try to set the color of the trash can to be eye-catching. The location of the trash can should be convenient and reasonable. Put more trash cans where necessary, and choose the type that is convenient for putting garbage in. If the environment and conditions permit, you can take some compulsory measures, such as setting a camera near the trash can and informing the actor of uncivilized habits, which will be recorded by the camera. Please respect yourself. You can also send someone to supervise bad behavior, and of course you can engage in some positive publicity activities. You can also take the responsibility system to let the parties take turns to take out the garbage.