Why do you fear?
You are allowed to have alts but you should not be too afraid to speak out something that you believe should be spoken. I understand these days some users use their trust feedback as their tool to hostage others but you should not be afraid of it. These days having few negative inspired neutral feedback or even red feedback is kind of prestigious things LOL

Anyway, on topic. As long as these accounts are not involving in any trade they should be fine. Let them lure the advertisers 😂
If they do not pick a good campaign manger then they deserve to have some signature spammers in their campaigns LOL

Make a post in this topic showing why do you think that you are suspecting them with evidence and leave neutral tag for them.