Actually there is a proverb
Like a crazed archer scattering firebrands and deadly arrows
Is the man who deceives his neighbor, and then says, "I was only joking."
Common sense dictates that you don't make jokes about certain things.
Your own words say that it is stressful for everyone, some of whom have waited for years and then you say, can't you take a joke, I feel sorry for you. Maybe you should try to be more sensitive to others plights and seeing you suggest everyone should develop thick skin to your joke, maybe you should do the same seeing you are offended that others didn't appreciate your joke - practice what you preach.
Your "joke" was written to make it sound believable that there was a change in the processing, not a very direct attempt at humor at BCIS. No your joke was trying to elicit the response "really" "that's great" by people here, your joke was an attempt to suck the people in here not a swipe at BCIS. At best it was an indirect swipe at BCIS.
Great you wanted to lighten things up here for everyone, there have been a lot of jokes about INS, but don't fuck with peoples hopes/lives and say I was only joking. Can't you take a joke.