I usually radio trigger them anyway but a hot one could fry your radio receiver at the flash end.
On another forum, someone suggested this was the case with the cheap Cactus radio triggers. I took mine apart and looked up the data sheet for the opto triac they use and found that it was rated at 400v.
"People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.