Some things do need to be called out. We had a guy with two accounts, where he would express strong (weird) opinions on one account and then back himself up from the other. He also used posts from both accounts to gang up on some members to a point where some might call it bullying. The funny thing was that nobody believed that the two were the same after he got called out until he eventually got banned. They couldn't figure out why the second guy got banned, when he hadn't posted anything that warranted it, so they were all asking for his reinstatement.
It's similar on Twitter and Youtube where people and organisations use multiple accounts to swarm the narrative. Suppose 100 new members suddenly appeared one day in this thread all spouting the same narrative and ganging up on you when you disagreed, then you found out that it was all from the same guy. Wouldn't you want someone to do something about it.
Also, there is a well known trader, who posts on the forum. He has started several stooge accounts to falsely review and promote the stuff he sells. People make decisions on what to buy based on what they see other people raving about on the forum, which is obviously a problem, when what they're being told is false and they've put their money down.