What makes you think that any info you get on an anonymous forum, would not also be erroneous?
Actually, I did not get my information from an anonymous forum, it is what I learned through unofficial discussions with other expats like myself.
Information you get from a qualified attorney may also be erroneous for that matter.
This is only a discussion, if it were essential for me to know this information or any other facts concerning such, I would seek legal counsel from a qualified immigration attorney.
The web is a great place to get background information and there are many people that can certainly point you in the right direction so that if you do need to find out something, you can do so much more quickly and easily and have a good grounding in a subject you would otherwise know little about.