As social media reacted, Morgan continued to tweet: "People are actually defending Shia LaBeouf. The world's gone mad. He's invented a supposed 'rape' for cheap PR - utterly shameful."
However, many followers disagreed. Janet Morris wrote: "If he didn't consent to it, it's rape. If anyone should be ashamed, it's people who are saying it wasn't rape."
Another user wrote: "I didn't think you could any more ignorant...I was wrong!"
"Why? If it's non-consenting then it doesn't matter how 'major' the offence is, and because he's a man doesn't change anything..."
LaBoeuf alleges the unnamed woman, who had waited in the queue with her boyfriend, entered the room, stripped him, whipped his legs and raped him. He did not respond during the alleged assault on Valentine's Day earlier this year.
His girlfriend of two years, Mia Goth, was also in the queue waiting to see the actor. LaBeouf said word passed back through the crowd about the event, reaching Goth.
• Read more: Shia LaBeouf: I was raped during art performance
"When she came in she asked for an explanation, and I couldn't speak, so we both sat with this unexplained trauma silently. It was painful."
The accusation emerged from a Dazed Digital interview earlier this week.
- The Independent