Poser fashion was down for awhile, then up again, and some people said they got some kind of warning about the site maybe harmful to their computer. I never got any such message. However, now I see the site is down again and the address can't be found.

You can still see much of it at this internet archive link:

http://web.archive.org/web/*/http://www.poserfashion.net/

But yes, many links that I had and have in my freebie bookmarks folder are in fact dead. But such is life. It costs money to keep sites up and running, and many put up freebies as a hobby.  Eventually life gets in the way, or finances change that you have to weigh the cost of keeping up a site that is a money pit vs taking it down and putting that money towards something else.  I did that to my own website for about 5 years. It was just costing me too much money to keep it running.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi