- Are Images that taken from Sagubooru, Akibakko, Gelbooru, etc. that can be said as a copied version sites of Danbooru was permitted to be uploaded ?
Yes. Neither danbooru nor any of its alternatives "own" any of the images posted. As long as it conforms to the uploading rules, it's fair game.
- Am I allowed to post Hentai Doujinshi that more from 50 pages ?
Personally, I wouldn't do it.
It's not directly prohibited, but I strongly suggest you lurk around some more until you are fully aware of the quality standards here and whether the doujinshi you're going to post is really worth it.
- How about some Super heroes like : Kamen Rider, power Rangers, Transformers images ?
Again, not prohibited in any way, but I don't think they're popular. Searching 'sentai' only yields 9 results.
- For Privileged members they are not allowed to post images like Furry, gay, guro, & poorly drawn art to here.
So is this also occured to non-privileged member like me ?
Yes. It's emphasized for privileged members because their uploads appear immediately, where as uploads from standard members will need approval.
If so, this means Yuri/Yaoi was not permitted ?, For Guro: I don't know what it means, can you tell me so I don't make a mistake ? , Poorly drawn art... is that means Fanart or a not good looking images was not permitted to be posted on here ?
The 'gay' bit confuses me a bit too, but I assume that it only concerns yaoi and not yuri. Don't take my word for it, though.
Guro stands for images that display extremely explicit violence, blood, internal organs and so forth. Google for more.
Poorly drawn art are all images that show a complete lack of basic composition skills, no understanding of perspective, bad coloring, etc.
Please tell me the answer ASAP before I make any bad mistake, I don't want to be get flammed b'cuz of my foolish action.
The easiest way to avoid problems is to lurk more. See what other people post, what people vote up and what they ignore or vote down. By making these minor mental notes you'll eventually understand the general flow and taste of danbooru and its members.
Edit:the current forum system seems to leave 'p' out occasionally, making paragraph breaks appear as line breaks.