There are hundreds of thousands of legitimate applications that are new to LiveGrid so your suggestion would produce a lot of warning to users who wouldn't know whether to allow the application to run or not.
Well, what I meant is when a file is downloaded. I know they could be some legitimate files but if you narrow it down to factors such as:
- File has a digital signature
- The source of the file
- How long the file has been created
- Amount of users with the file
- Where the file has been downloaded from
And some other factors it would narrow it down. Most major AVs use the cloud to their advantage so this was just like an idea.