"I always verify my facts before posting. Others should take up the practice."

When quoting, its best practice to give the source. Without an indication of the source of your quote - or better still, a working link (blue clicky) to that quote - it's nothing more than, as Nigel would say, "your opinion, with no basis in fact". If you're too lazy to give your sources as a matter of good practice, it shouldn't come as a surprise when you're asked to provide them.

It's not rocket science, it's Composition Class 101.