Hi there! I just joined and have looked a rather large amount of the SCPs over. I had a concept for one, and wanted to run it by the group:
The concept is for an un-hero (an anti-hero would be more accurate of a title aside from the grimdark and gritty connotations). What this would mean is that at the most basic, the person would have seemed almost superheroic, a high level metahuman/demon/???/profit sort of creature that tried to right wrongs and overall do good works. Unfortunately, whenever he helps someone, no matter how incidental it is, he damns them to a considerably worse fate later.
For examples, a person saved from a knife-wielding mugger would die in a massive gang war later, their body riddled with bullets. A person saved from a fire would find themselves burned to a crisp at some point later. Saved from a fall? Paraplegic. It would, as the SCP would find out when apprehended, even involve remarkably incidental things; so much as pulling a chair out to offer to someone would cause them to have some sort of ridiculous hip-breaking injury in the immediate future.