"This is EXTREMELY DANGEROUS and will very likely cause massive loss of data. DO NOT USE THIS COMMAND."

"VERY DANGEROUS, DON'T EVEN THINK ABOUT USING IT."

"VERY DANGEROUS, DO NOT USE!!"

"This command is EXTREMELY DANGEROUS and could destroy both the drive and all data on it. DO NOT USE THIS COMMAND."

"EXCEPTIONALLY DANGEROUS. DO NOT USE THIS OPTION!!"

"VERY DANGEROUS."

"(DANGEROUS)"

There's a reason why TvTropes lists the "hdparm" command under "Schmuck Bait".