Awww, Umberto this is supposed to make people want to buy the scenery if they haven't considered the trial download. Consider it an advertisement. No one likes to click links.... I'll just stop posting screenshots from now on.
I haven't said you can't post Screenshots, this IS the Screenshots forum.
But we have some rules, and one is not using external servers and inline images inside the post, which makes the whole page too big to read if it's full of pictures, and there are some who pays their internet connection by the traffic so, having such images posted in full size without the ability to choose which one to look at, is not good manners towards those with slower and/or costly connections (like those on 3G, especially now which is more or less vacation time).
The forum has the ability to let you attach an image directly in your post, without having to upload first to an external server, and it has automatic thumbnail generation, which helps keep the page size down, that's what you should use to post screenshots, especially if you want to post many in the same thread.