Personally I think his presence (not him) was making a mockery of the show, this was further supported by many of the comments here and elsewhere which for a large part were more about voting to spite the judges than a positive vote for john.
I heard phone calls on the radio with people saying they never watch the program but were voting for John.
Thing is some like me had no option to vote him off. It's all well and good saying the people have voted but there is no option to vote him off. From what I could tell there was pretty much a 50/50 split, those that wanted him on and those that wanted him off.
The final thing is the judges, it seems some people are upset about his treatment, to be honest I can't see how on the one hand they can claim John should be on because he is providing entertainment and then criticise a panel of judges who are there simply for the same purpose. I don't think any of the comments were unjustified, fact was he was an awful dance regardless of whether it was entertaining or not.