No problems with the stickers but the Flickr reply was totally unnecessary.
People can't be expected to 'get' the joke if they don't use Autoshite and the poor user thought you were attacking him personally. It really stretches the whole ironic thing right to its limits.
Feeling the H8 too much in this Forum at the moment and I just don't have the bandwidth for this sort of shit anymore.
As you were 
Why would someone putting a sticker on his own car and taking a photograph of it make someone else think they were being personally attacked?
I cant see how any of that makes any sense?
*edit, Unless the difference of opinion is a personal attack. In which case, we are all fucked.
And to be fair, Rovers ARE shit. I'd still have one mind.