If the cages are plastic or composite, don't tighten the bolts too much or you can stress or even crack the plastic. The damage might not show up for 6 months. Like everything else on the bike, a quick check for loose things should be a habit anyway.
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FB4K - Every October we wrench on donated bikes. Every December, a few thousand kids get bikes for Christmas. For many, it is their first bike, ever. Every bike, new and used, was donated, built, cleaned and repaired. Check us out on FaceBook: FB4K.
Disclaimer: 99% of what I know about cycling I learned on BF. That would make, ummm, 1% experience. And a lot of posts.