The Russian site is not clear enough and not in the proper language, always difficult if you working worldwide, so no blame to the owner.
That is one of the reasons why I quit updating that site, but more important is that if I get a new device (Lenovo ThinkPad L530, for example), I would have had to mark it as "Poor", because there was missing support for memory above 512 meg (it has 4 GB), and the Realtek NIC did not work. Both problems have been resolved, so now the rating should be "Good", or even "Excelent", but there is no way, that I can find, to change that rating. All that I can do, is add a note that it has been resolved, and the rating should now change. A casual observer would never bother to read all of the notes that change the rating. All they will see is the "Poor" rating. I also don't want to bother finding web pages that refer to the device. Most of the time, they really don't apply anyway. A user can google for that information, if they care.
The main problem with all of the hardware rating sites, is that they get old, and it can be difficult to determine if a device is currently available, or 10 years old, and "out of stock". I don't know of a good way to resolve that problem.
I agree with others that it must be simple for adding.
Absolutely required. It should also be easy to change things, as the situation changes.
Unfortunately, as noted, there are people out there who can't seem to control the urge to destroy things. Using the OS2WORLD logon helps, but that can still be misused (as seen in the forums sometimes), and a lot of damage could be done, very quickly. Perhaps, there could be a list of "known" users, who can post without review. Others would need to have their posts reviewed, before changes are made. The person who does the review could decide to add the poster to the white list, leave them unrated, or banish them. That will be a LOT of work, for somebody, for a while, but probably not as much work as cleaning up a mess.