Normally.. I'd agree with you completely. In this case, it was called as seen. The bug was spam.. sure, it was a joke, but it was also spam. People work very long and hard on those bugs, and imagine the amount of people who legitimately file crap bugs due to ignorance, and you can see that it probably gets flat out annoying and on people's nerves when they come across one that was an obvious fake.

Weeding out proper bugs from legitimate bugs already takes time and effort - they don't need people adding to the mess to make a joke.

So I perfectly understand the response.