Dame Tanni's anger over online abuse.
The sporting hero, who won a total of 11 gold medals during her glittering career, said she was stunned at some of the reaction when she revealed she had to crawl off a train because no-one would help get her wheelchair onto the platform.
Dame Tanni was born with spina bifida and lived in Ward End before the Sydney 2000 Paralympics.
She said: "The most offensive messages were that there should be a cattle truck at the back of the train for wheelchair users to sit together and that I should not be out at midnight.
"If someone said women, or black people, should not be out at midnight there would be outrage. I don't know why this is different for disabled people."
Dame Tanni is now heading up the A2B For All campaign, which calls for a central watchdog to deal with claims of discrimination.
CYBER BULLYING ON RISE: PAGES 6&7