<human>: Can you succinctly summarize the text in 1-3 sentences?

Here's the story.  My office has three teams or branches.  I used to be on one of them but a little less than a year ago I was moved to another.  Most of my work friends, however, are still in my former branch.  I went to their office space to pay them a visit the other day and when I asked them how things were going one of them said, "Fine, except that Sarah and Lindsay got into a big fight..."  When I asked more about what happened everyone got very awkward and weird and wouldn't say anything further.   But at the same time, they seemed to be sort of making light of the situation so I doubted it was anything serious.  

Later, via IM I sort of teased both Sarah and Lindsay about it in the hope they would give me more information on the spat.  Then suddenly the deputy director of my office comes by my desk and asks me if anything is going on with my former team because he's been sensing a lot of tension and is worried there might be an HR issue.  I deny knowing anything but instantly feel guilty and apologize to my former teammates for teasing them and poking my nose into a serious issue that was none of my business.  But then...they all started cracking up and admit to me the whole thing was a JOKE!  They even put our deputy office director up to it.

So reddit, how can I get revenge on these people in an awesome way?  The catch is they know that I am thirsty for revenge so they will be suspicious of almost anything I do.   Elaborate and/or overblown ideas highly encouraged.  Thanks reddit!
<bot>: Some coworkers tricked me into thinking that they were having a huge fight using a ruse involving our deputy office director.  How can I get revenge???