I don't doubt that inexperienced owners have taken it upon themselves to try and implant the tags. The fact is, if it was my animal, and I didn't know what I was doing, I would have some else do it. I don't feel sorry for these people one bit. There was a lot of fuss a few years back (and even a couple weeks ago) and many allegations made as to the deadly effects of the Avid chips. People were claiming the tags were extremely harmful and responsible for killing a number of animals at the Columbus Zoo. They also claimed a few of the researchers in the state were also responsible for "killing" the native massasaugas with their use of the PIT tags. Their stance was that even if the procedure was done correctly, the animals were still harmed and more vulnerable to predation and road mortality after their release.
I don't know if they make smaller PIT tags, but the Avid chips I have fit right into a 12 gauge needle, and would not fit into a smaller one.
I don't exactly agree with some of the info in this article but...
http://www.journal-news.com/local/content/gen/ap/OH_Reptile_Tags.html
Now that you have me on a tangent, if anything is killing the Sistrurus right now, it is the poor land management practices of the people running the Wildlife Areas. Not all of them are bad, but some of them are terrible. Mowing at the wrong time of the year, in all the wrong places and cutting the grass way too short has led to the deaths of far too many massasaugas in my opinion. In other areas, they let the best habitat turn into mature forest. Many of the men running these areas will admit to shooting every rattlesnake on site less that 20 years ago. Just because their status changed a few years back now, I don't think many of these people decided to start liking these animals. Are there other problems as well? Sure, but this sure doesn't help things...