Could these two accounts be checked out as a mulitple account player.
Reasons:
Both from same country;
Play sequence from both accounts is sequential and usually within one to two minutes of the other account logging off.
Play strategies in games reviewed including the one I played, are designed to aid the other account. Attacks on each other are logical only in the context of two accounts aiding each other.
They are signed in to all the same games .
Either its two friends playing from the same PC, fine, but they should announce to all that they have a secret alliance, or its a cheat.