(Sorry if this is the wrong thread to be posting in, but I thought this might be useful.)
I made a quick AppleScript for clearing the Downloads folder and then emptying the Trash. I put it into a script here.
Here are the steps to have it run every login:

I made a quick AppleScript for clearing the Downloads folder and then emptying the Trash. I put it into a script here.
Here are the steps to have it run every login:
- Make sure to change "YOUR USERNAME" in the script to your actual username as it appears on you home folder.
- Go to File > Export and save the script as an application.
- Delete the original script.
- Put the application anywhere but the Downloads folder.
- Go to
> System Preferences > Users & Groups > Login Items and add the application.