Another function is to hide offensive words or jokes.
What is it nowadays with people wanting to censor themselves out of fear that someone else will think it's offensive? It's ridiculous:
being offended is a choice of the receiver, and honestly I'm offended by people who want to limit their own freedom of speech out of fear that someone might get his feelings hurt on the internet! Oh noes!
It's okay to offended people! Offensive jokes are often funny. Don't let SJW decide what you're allowed to say or even think!
Total line of the source code is only 113 lines (29, 37 and 47 from 3 different files), surely someone could modify it without lots of effort to make it compatible bitcointalk SMF.
Each change to the forum has the risk of adding security problems.
An actual spoiler tag would allow the text to be clearly marked as a spoiler, and will allow the reader to easily view the spoiler text.
That's easy:
Spoiler:
hiddenIt doesn't work on images though.