I found his profile. He's a 23 year old male who is from Australia, but likely lives in Finland. He's probably Introverted and I think he has trust issues. Search for members and search keyword "Krisjan", and you will find him. He also likes the Fallout series.
good note taking, but I’ve deduced the fallout thing isn’t true, my mistake
If he is that bad and send you illegal requests and content, I don't see why you are whining on a forum instead of reporting it to the competent authorities.
For such cases, in France, there is something called "signalement.gouv". I am pretty sure that such services exist in other countries.
maybe these are things that don't concern me because I don't know Krisjan. But we should know and understand if it is really very dangerous. You should always be careful when meeting strange characters and not talk to them.