IB
Thats one of the negative aspects of M12.
There are a lot of sites out there containing malicious HTML code.

It has been said thats it is OK because your not actually running the code in a browser but as you have discovered it is still risky.

M12 also scans a lot of very 'seedy' sites that i would not want to be associated with.
This was the main reason i gave up on it.