I can vouch that extensive screening is indeed done for adoptive parents. My wife and I have been in the process for the past 8 months, and there's still more paperwork that we need to get for the government agencies that will be evaluating our suitability to raise a child.
Remind me never to get on one of these gay threads again. They are usually full of people who do not want to consider a new thought. I thank you for confirming the extensive searches that almost everytwhere precede adoptions.
Since you've been looking into this, I am sure you also know that I am telling the truth about hard to place children, the dreadful possibilities which face them almost everywhere, and the fact that a loving stable and mature gay couple certainly beats those alternatives.