Thank you for sharing your thoughts. I've read several debunking articles by Joe Nickell and he seems to be a logical thinker, but people like him still do assume. He can't be sure he is correct, otherwise SHC would no longer be up for debate by anyone.
To answer your question, yes I am worried about this phenomenon. I don't know what to believe as I've heard many theories from many sources. The scariest (in my personal opinion) is on rare occasions when you have claimed SURVIVORS of SHC and when you have WITNESSES of SHC.
These two freak me out, because while most cases are of the victims being alone in their homes, certain reports have witnesses and alleged survivors. I have read their stories and even seen verbal interviews with some of them. They look genuinely afraid, baffled, confused and not knowing what to make of what they/their loved ones experienced.
I don't think all witnesses or claimed survivors are liars or attention seekers either. Some of them appear quietly horrified, not really wanting to relive what they saw/felt, but not knowing how else to respond when questioned. And if people aren't lying ... wouldn't that mean their stories are true? Of course there's no way to be sure they're not lying...but it seems unlikely that ALL of them would lie about the same thing.