Pulled into an 'emergency' meeting with a group of web designers deeply concerned a particular service wasn't going to meet all their requirements.
DevA: "For each page, Its going to be A LOT of work to retrieve all the data and store it's state. Every page load will require a round trip to the service."
DevB: "Yes, we aren't sure how the service should be changed to do what we need."
Mgr: "What is it not doing now? Doesn't the service already returns all the necessary data?"
DevA: "Well...um...its all the boolean fields. Some may be defaulted from the database or false because the user unchecked the box. We have to know which is which"
Me: "Why? Are you doing anything different in the UI? Checkbox will be true or false. What or who set that value is irrelevant"
DevC: "Well, it matters if the user didn't fill out all other other values."
Me: "How so?"
DevA: "Its matters because the values in the other fields. Its going to be A TON of work to figure out."
<mgr goes to the white board>
Mgr: "Lets map this out...what fields are you needing to trigger the state on?"
DevA: "Um...uh...the 'Approved' field...and um...'OK to Contact' field"
Mgr: "Just those two?"
DevA: "Yea..um...there are other fields, but whether or not to show the edit box depends on those two."
Me: "The service already returns data, you only have two fields to check? I don't see a need to change the service at all."
DevA: "Returning all that data, we are going have a serious scaling problem. We'll be hitting the service A LOT. All that javascript could cause performance problems too"
Me: "How much data are we talking about? Name, address, couple of booleans?"
DevA: "I have to serialize the data. All that logic is going to be reeeaaallly complicated. It might be better if the service returned only the data I need."
Me: "$64,000 question, how often is this feature going to be used on the web site? Maybe once? Few hundred a week?"
Mgr: "We have no idea. A lot of the data will be pre-populated and we're only sending out a few thousand invitations. More around the holidays...but honestly, not very many."
Me: "Changing that service only for this particular area of the web site isn't going to happen. Changing the UI is the only course of action."
DevA: "Oh frack I can't wait until this project is over."

DevA...how the funck do still have a job here? You wasted about half-hour of my time with your cry-baby crap. Where is my hammer...no...no..don't go there...ahhh...thanks devrant. Prison sentence diverted.