What I've heard was that the actual shooting wasn't a `problem' with quite a few of the `so-called' night-vision optics but instead it was a problem of people `forgetting' that they *were* super-sensitive light gatherers and were firing them up when it wasn't dark. Usually just plain `popped' the main `tube'! Now, just recently, I've heard that the newer ones, Gen III (Read: *Expensive*!), are a lot more `forgiving' and the `problems' are a bit more infrequent. The basic electronics are pretty danged tough these days and for the most part I wouldn't worry about it *except* on the cheaper ones. (One can only go as `low' as a Gen I tube and after that the basic electronics are the next thing that gets `cut'. {WAN GRIN!})
Give me about a week or so of checking around with a few `sources' and I'll see if I can come up with both some more info and some URLs that might help. (I've been having some `varmint' problems at night recently and I've been meaning to see if I can get one or two of the `local gurus' to `lend' me one or two to try out. I'll most likely be shooting them off of a reasonably heavy .308 bolt action when or if I do. {GRIN!})