I am not a moderator, so what I say is just this member's personal opinion.
Age verification has entered a dark new age. Most sites that say they require age verification will settle for an upload of a scan/.jpg of the applicant's driver's licence or other government identification. These can be altered by someone skillful with Photoshop, or ordered on the dark web for a fee as little as 100 USD. Sites requiring age verification have little incentive to resort to more sophisticated approaches, as they don't want to turn away business. I don't think they are concerned with the "negative aspects" you mention, other than not wanting to host an OnlyFans (or the like) model who is quite obviously under 18
I heard a BBC report this morning that Australia was banning social media accounts for those under 14. One can argue the pros and cons of such a rule, but I suspect it will spawn a vigourous industry in making false ID's.
The people who run gt.ru have no doubt given this matter considerable thought, and I hope they weigh in here.