Plankblender.
If you fly IFR in VMC in congested VFR areas and you fail to look out the window, you are more culpable than the inexperienced VFR pilot if a prang occurs.
If an IFR pilot in IMC is flying an approach there is no danger because VFR traffic is grounded by definition.
VFR pilots flying in IMC are breaking the law. Take that matter with the regulator, or if you believe everyone flying but you is a criminal, stay in bed.
Jabawocky.
Are you advocating it's best not to call at all in case you get confused. If you had two bad experiences at Bundy and Inglewood where the pilot was lost or something, why don't you do something about it. Such action may save their lives as well don't you think.