Yep - the lesson most certainly is DYOR. I would add one...

Yep - the lesson most certainly is DYOR. I would add one additional piece of advice - don't make the posts of pumpers on HC a part of that research.
If you bought shares yesterday and didn't see the low 2's coming today then buy some bank shares and turn your computer off. Hand augers - seriously!!! I told my 11 year old son and he said they could use his dilapidated Tonka trucks - for a small fee!!
As for the defamation issue - it ought to be noted that truth is a statutory defence against any action. Irrespective of who monitors what - if what is said is true then the action will fall.
At this point in time I suspect you could visit your local pet shop and discover that the resident galah would have an opinion on QBL You may also find that that same galah probably has an opinion on current defamation law.
Enjoy your NYE!!