Oh, I have a story about the guy who made Dr. Bright (I don't know his actual name so I'll just call him Bright).
Back around 2011-2012, someone on LiveJournal made a roleplay game based on the SCP Foundation. This wasn't anything for-profit, or claiming to be an official part of the SCP Foundation, it was an insignificant roleplay game made by a few fans. Bright found it, and asked if he could join as Dr. Bright. The creators, excited that someone who was involved in the actual wiki wanted to play in their game, said yes.
It turns out he really didn't care about playing in the game, and his intentions for joining were to keep it from becoming "stupid" or straying too far from SCP canon. His entire presence in the game was one tantrum after another as he tried to play canon police and tell people that they were doing it wrong. In the end, he threw such a big fit that culminated in him telling people that Dr. Bright was going to kill their characters because they were stupid characters that would never be part of the actual SCP Foundation that the creators just said fuck it and closed the game. He went crying to another LiveJournal community about how the players in that community just don't care enough about SCP Foundation canon, to which the response was an overwhelming "why do you care?"
So, unsurprisingly, the guy with the Mary Sue immortal scientist character that breaks basically every rule on the SCP Wiki is a huge manbaby that can't handle people writing things he doesn't like on different websites.
As for my opinion about SCP as a whole, there are some good creepy creations there but the rules and guidelines for writing there are peak :autism: and so are a lot of the more prominent members. The fact that a lot of these exceptional individuals seem to think they're god's gift to horror writing too doesn't help.