Terms of site quoting

Common sense is not so common.
—Voltaire

There are a few easy rules about the issue.

1. Quoting site is necessary!
2. Asking permission to do this is NOT required!
3. Copying the text is possible (it is general).
4. Copying pictures is not recommended (they are mine).
5. Putting a link to the site as a source is desired.
6. Requiring point 5 is stupid.