As a response to the express interest demonstrated by the distinguished ladies and gentlemen in this Reddit thread, I felt a remedy to the situation ought to be available at once.
This is a simple user script that adds the critical functionality of handling the formalities of trading correspondence in a most proper and appropriate way to poe.trade.
This is a User Script. You need to add it to your Greasemonky for Firefox or a similar plug-in for your browser.
Open the script in your browser and you should get the install prompt from your user script handling plug-in.