In recent CS:GO updates VALVe modified a cvar or a part of a code and SMAC false bans almost everyone. I noticed that when i saw around 20 bans in a row by SMAC in our ban list. I updated SMAC so hopefully this is fixed now. I also have already started unbanning bans based on the creation date of this topic. It's actually a report about this issue.
Anyway. I hope this is fixed now since i updated SMAC. If the issue continues, i will have to disable the specific SMAC module. But that means we will have to count on our admins more.