Well.....I have NO experience with anything like these collars .....but all I can say is ONE....I wouldn't want something like that around a small yorkies neck...
and TWO....anything that could cause them to YELP is CRUEL.
Those collars sound way too dangerous in my opinion...I personally could never ever use one no matter how frustrated I was.
ps....Using someones first name is a way of talking directly to them and in no way offensive...and if it bothers anyone to have them used...then you can edit your signature to take it out.....many people don't have their first names posted............ easy solution !