Scanning bans are automatic and are a result of certain word combinations, possibly contact info, possibly URL sharing or the network you use. I'm not going to speculate which one of those or a combination of those is causing the system response. Mods have nothing to do with that. With such a huge volume of traffic, there are certain necessary measures in place to combat spam and scams. There is no other way to combat this.
If you ran into a very short ban, you likely ran into someone else's ban on the same network. Some ISP's are junky and don't provide huge network resources in some regions. Moderators have nothing to do with this.
Registered usernames are completely unique. Generic username can be an issue only when it's a Guest login.
We can look into bans while they're active and try to determine what has taken place using evidence, which is why we have a Ban Appeal process, ask for details and a screenshot.
It doesn't sound like your unfortunate experiences have any mod involvement.