Let's take a look at your forums. ;)

http://forum.heroesleague.ru/ - the forum of the Heroes League, there is a section called "For Life..."
http://heroesportal.net/tavern/?enter - the HeroesPortal forum
There is a small section called "Wardrobe" which contains 33 topics.

Basically, this is an analogue of our WoW. Well, these are the most "decent" forums on your list. But the further you go into the forest, the thicker the partisans.

http://www.forum.heroes.by/index.php - the forum of the Heroes.by website
There is a section called "Tribune" which contains only 2 topics.

And only 2-3 people are there, yeah. By the way, let's pay attention to the title of the first topic. I will quote it right here: "LYRICS, DAMN!!!!".
How nice, caps, veiled profanity, yeah?
And what a brutal ending.

http://forum.nivalinteractive.ru/ - the official Nival Interactive forum
There is a section called "Smoking Room - Forum for Non-Gaming Communication"

Official forum of the developer. You would think that this is the place where such things shouldn't happen. But no. Look at the topics that can be found here, and moderators often participate in them.
http://forum.nivalinteractive.ru/showthread.php?t=32656
This is not just a discussion of erotica, they even post it here!!! What a shame! Let's take a look at this, for example!
http://forum.nivalinteractive.ru/showpost.php?p=966340&postcount=4003
And there are a lot of such pictures! Where is the admin looking? Oh, poor SilentSmart!