USC athletic director Mike Bohn just went scorched-earth on a school booster for "abhorrent and blatantly racist" tweets ... revoking the person's privileges to Trojan season tickets.
A Twitter user operating under the handle "@SoCalMAB" -- an account that has since been deleted -- fired off several disturbing tweets over the weekend during national protests.
In some, the user -- whose account had a profile picture of former USC receiver Michael Pittman standing next to a female fan -- advocated to "shoot the protestors."
The tweets got so nasty ... Pittman himself felt the need to intervene, telling the account to remove his picture from the profile ASAP.