Why can't we just spread the trick that one [spacebar] equals a character? The trick is simple: [spacebar] equals a character as long as it isn't the last character in the post, and when several [spaces] are "written" after each other they become one.
Like if I only want to post where I found something, for example "At youtube" I can simply writeSpoiler:
It will appear as "At youtube." no need for "16chars of at youtube bro".
Try it yourself. Reply to this thread with posts that appear to have less than 16 characters.