No... you should post it on your own web site with clear copyright information and metadata. That way there is no way any company can claim that they made a reasonable effort to find the owner and couldn't get the information.
Incorrect. In the US right now it's not uncommon for newsrooms to strip metadata and use photography even taken from professionals then claim ignorance or worse that they have a license (from a never specified third party). Corporations stealing photography for advertising, websites and promotional print media is common too.
Media companies own the big stock photography houses. The purpose of this law is to devalue photography for anyone but themselves, and to make sure that perpetual copyright isn't a two edged sword for them. The same legislation has been floated in the US.