The plastic snap caps work quite well for rimfires, at least as well as they do for centerfires. The whole idea is to give the firing pin something to strike against and dissapate the energy derived from the whole firing process; to do so without something in the chamber is akin to "firing" a bow without an arrow, eventually the bow will break. If it is too onerous to get the smnap caps, using a spent case will do for a few snaps then the case will need to be turned to put a new part of the rim under the hammer. If too many shots are taken without doing this, the firing pin will eventually push the rim deep enough to make it essentually an empty chamber. The rim may even become pierced which would further stress the pin as it catches on the edges.
As for the original poster, knocking off the attitude and showing some respect would go a long ways towards gaining the respect you feel you deserve. I find it difficult to believe you know as much as you think you do based on the questions you've raised and response to answers posted in return. Much of your descriptions of yourself (as well as your tone and nature of talking) are concerning to me as they strike a resemblance to other juveniles who have "made the news" lately in places like Red Lak, MN and Columbine, CO to name a couple. For that reason, I find it not worth my while to respond further to his posts as I do not wish to become involved with him if something untoward should occur.