This is very true. Skype had huge exploits and some blackhat folks went to Skype support and told them that the victim's account is treating them and Skype bann

This is very true. Skype had huge exploits and some blackhat folks went to Skype support and told them that the victim's account is treating them and Skype banned victims can't without any investigation. Skype also banned victim who was infected with a malware where malware would just post links to other people to remove them randomly from groups. Skype just bans you for no reason. I've lost one of my most valuable business accounts to scammers who used malware attack to destroy my account.