Been to every game since '02, save for '12. Wife (then girlfriend) went once and will not return. She was pushed against the wall while in line for the bathroom... "Tech girls don't use the restroom before us."
Separately during pregame tailgating, with others as a witness, a guy and guy friend walked up unsolicited to her with a female friend and said stte "confirms ugly girls go to Tech".
I've had bottles thrown at our group outside of the stadium, unprovoked.
Had drinks thrown at us from a few rows up (student section).
After a loss some guys jumped out of a bush a started barking at us on our way back to the car, not doing anything other than talking.
All of the above has happened in different combinations, me+wife, me+guy friends, me+mix of GT/UGA fans.
In fairness, at a home game I almost beat the s*** out of a UGA fan who came into our student block, following a GT L, and demanded his buddy to take a picture of him doing a Jesus pose in front of the scoreboard right in the middle of us. Only reason I didn't beat his a**... my friends pulled me away after I threw him down and then they went after him. Kid got up and walked away and I assure you he regretted it.
Other times I've had no trouble.
No matter what, I will be there again this year. Few better moments in life than '08 when me + buddy worked our way down next to the band and Dwyer jumpstarted the 2nd half, and then '14 with the deafening silence after both the Kick and the Pick.