Just think how many on here rubbed their hands with glee when it was announced that Zoe was standing in for Claudia - they're trolls. They didn't know what had happened but made assumptions based on their prejudice against her and could gloat and show how nasty they are while hiding behind a screen name.
It's OK to criticise someone's performance, but to make nasty personal comments like calling her a hunchback says more about the person making the comment than it does about Claudia. Saying Bruce should retire and why he should isn't the same as calling someone nasty names or being threatening.
The DS trolls aren't usually as bad as those who made Robin Williams wife quit Twitter, and fortunately there are now laws regarding offensive and threatening comments made on line, but its just a shame that they think freedom of speech means they can say anything they like no matter how sick or offensive.
Hope Matilda is feeling much better and makes a full recovery soon, so Claudia can get her life back to normal and return to Strictly.