Closest I've ever come to something like that was at DKR when I went to the 2019 opener against La. Tech, wearing my LSU gear.
The number of UT fans who howled that I wasn't supposed to be there til next week and strolled off laughing at themselves hardily as if they'd said something terribly clever and original....were legion.
That's not exactly getting harassed, but it differed from them generally ignoring me when I used to go in my LSU gear.