What’s it mean?
It means someone picked the blue radioactive icon for their post icon. Probably to get attention.
LOL, really. It is on my accident prone thread (not post) and I certainly didn’t put it there.
I deleted it for you. No one but you, Jay or myself could put that there I suspect that you may have hit the radio button in error as it is just above the box where you enter the thread title.
Thanks Bill.
Well, Bob is “accident prone” so that makes sense. 
I thought it meant “this thread may contain toxic personalities.” 
(jokes, jokes)
Put on a lead suit before entering one of Bob’s threads… 
Excessive posts?
No, No, No, its from all of those x-rays!!!
A lot of interesting possibilities…
Or at the very least a gas mask…?? 
LMAO, ed zachery!