Hey guys, how do you see if someone has been banned?
Using bpip.org it's the easiest to see that, here's the @Mpamaegbu account on bpip
https://bpip.org/Profile?id=940323 you can see there's a sign of Archived under his profile, mean he has been banned.
Another way you can see on modlog
https://bitcointalk.org/modlog.php only for recent user (I don't know the exact time) and banned user can't wear a signature.
I suggest you use the BPIP browser extension. some more additional options come with them, very useful for active users
For example how I see Mpamaegbu profile on the forum.

More about this extension here:
https://bitcointalk.org/index.php?topic=5224821.0