Hi there!
I hear your frustration baba, and it is so understood...
I really have no experience regarding the review copies, but i think you should consider "how many" you would like to give out for this purpose.
Maybe you can create a downloadable form, that whoever wants to review needs to fill up (so, you spend time on it, once). There you can ask whom they write for, credentials and all that. Also, make a note that says: not all forms "will be accepted" due to a limited number of copies available for that, and then you do what you decide. I think that free copies for promotion is a valid expense, and this is why you can have it under a "budget".
After the story I heard about the Golden tarot being stolen and printed, i don't think i'll ever put my whole deck up, at least not before it gets published.
It's a creepy world out there, with no respect of artistic copyright. We , artists have the reputation for not defending ourselves enough though.
Some friends of mine, started a site with their baby's pictures, calling it "the Prince", and put up an illustration of a company that does clothing for babies. they didn't ask for permission, and they didn't create a link leading to that site. According to them , they didn't "steal" anything, because they didn't try to make money out of it, but here is the problem! (I got so mad!!!!)
It's up to us, and ONLY up to us, to explain HOW WRONG THIS IS! This is our trade. Even if you make no money from it, you can't just take it....
Unfortunately, we don't seem to have the resources (or energy), to have somebody run after people, go and claim our right.
Honestly, make the copyright tags even bigger-better being paranoid and educational on the issue, than naive, and not taking responsibility on how we want our art and our rights to be taken care of.
Ok, now i'm "warm" too...