A woman has admitted throwing a milkshake over a homeless man as he was being punched and kicked on the ground.
Dana Hooper said she is afraid to leave the house after video of the incident went viral.
She pleaded guilty to common assault after thousands viewed the attack online.
Hooper was ordered to do unpaid work after a clip of her throwing liquid over the 60-year-old man was shown in court.
Hooper, 24, threw her milkshake over Nick Hulley as he groaned in pain and tried to defend himself, Brighton Magistrates' Court heard.
Hooper followed Mr Hulley after an earlier confrontation with him earlier in the evening near a theatre in the city on October 13.
A clip from the video was played in court as part of the prosecution evidence against Hooper.
Hooper, from Portslade, pleaded guilty to common assault by throwing her drink over Mr Hulley.
District Judge Teresa Szagun told Hooper her sentence was increased by the humiliation she subjected him to.
She said: "I found it was an aggravating feature you were prepared to continue following him - whilst he was being assaulted by others - to add to the humiliation by the action you took."
Suzanne Soros, prosecuting, said independent witnesses described being concerned for Mr Hulley's safety and trying to intervene.
"She carried on abusing him even after people were saying to leave him alone," Ms Soros said.
"They describe kicking while he was on the floor and he was shouting and groaning in pain.
"I could see him on his back, holding his arm up as if trying to protect himself, one said. "Female
One told a witness: "I'll stamp on his head in front of you."
Ms Soros said: "Female Two had a bottle in her hand and started sloshing the liquid on him."
Mr Hulley has not come forward to make a complaint, the court heard, and there was would be no financial compensation for him.
Hooper was with a group of friends on the Sunday evening.
Ed Fish, defending, said there has been a confrontation between Hooper, her friends and Mr Hulley.
The court heard Hooper has been afraid to leave home since the video went viral.
Mr Fish said: "She receives a tirade of abuse. Mr Fish said his client had lost control. She does apologise and she regrets it."
The judge told the defendant: "There has been a considerable backlash at the outrage at your behaviour.
"You having been shamed by social media and judged by them. It may be there wasn't a full picture of the circumstances.
"You say this was a retaliation for abuse from the victim earlier. "This is not any justification for your behaviour."
The judge acknowledged Hooper had a difficult and complex background and ordered her to serve a 12 month community order including 12 rehabilitation days and 80 hours unpaid work.
Hooper will also be under electronic weekend curfew and will have £175 costs and surcharge deducted from her benefits.