What do you think it could be?

Once again, I feel sorry for the online players. Okay, I suspected Alex_R, but how do I catch others and what evidence can I present?! Human logic and intuition are unpredictable, and explanations for certain events or actions can be as funny and incomprehensible as you like, but hypotheses and suspicions are not proof of guilt, and that's the whole problem! For me, online gaming is a game of "who can outsmart their opponent." Moreover, all this dirty business can be done on one computer and without the help of a friend... It's all very sad.