I suppose GOG can do something at least to palliate this problem, not sure why you are not doing it. It's getting ridiculous.

One question/idea: Why do reviews with extremely low or no positive ratings show up in the first places when "most useful first" is selected? I'm getting 0 of 1500 "reviews" (spam) in the first place... if 1500 people found something unhelpful, it not only shouldn't appear first, it should not appear at all. If you want to see those reviews having to press a link/button should be required (a la YouTube comments with negative votes).

There's already several threads about this, e.g.:
http://www.gog.com/forum/general/gog_why_the_hell_dont_you_remove_obvious_spam
http://www.gog.com/forum/general/spam_in_game_comments

And wishlist entries:
http://www.gog.com/wishlist/site/deal_with_spam_and_spammers_more_vigorously
http://www.gog.com/wishlist/site/add_ability_to_report_spam_reviews

Better sorting/filtering could be nice.

Yes, I looked for previous threads. And the newest one has its last post over a month ago... trying to get some attention back on the topic. It's reeeeally ridiculous that nothing has been done so far.

-- edit --

Ah, search didn't show the newest thread. I was refering to the first one you mention, the second didn't appear.