Just think, the admins have the power to edit your comment as they see fit and you'll have no proof as your comment isn't even marked as edited.
It's a scary thought.
If so, that in itself is scarier than anything else being discussed here.
To assume Reddit is a unedited source of truth is just insane. Why people felt it was 100% tamper proof is beyond me. I wouldn't even trust public companies like Twitter to not have potential flaws like this.
It's nothing new in UK, they are literally CCTV state now. Don't forget American folks that in most of the countries over here we don't have free speech ;)
And in the light of this news that Reddit CEO edited comments -- it's scary stuff -- for fun or not.
[0] http://www.liverpoolecho.co.uk/news/liverpool-news/watch-mom...