I use this one extensively in my PBP and in general discussion about tv/sports. Would it be trivial to implement this tag?

I see http://www.vbulletin-faq.com/forum/showthread.php?7403-BB-Code-Spoiler-Tag
&& https://www.phpbb.com/community/viewtopic.php?f=72&t=1014215 for other forum systems but since its bbcode is it not universally implementable?

I have been playing with JQuery recently and the show/hide expand/collapse function seems very simple. I guess it would not be hard to do this in mlf with java?

Its the one tag I really really miss in mlf.