1) 10 Gallons is large enough for the common species. Size above this, really only ristricts how many individuals you keep.
2) Sow bugs can reproduce well within the enclosure and brevs have eaten them. Springtails can be added in to clean the soil aswell, and the babies will take them during their first while before they can accept the sowbugs. The crickets did pretty well in my tank and lasted a few days if uneaten, since they could much on many plants. I was only buying crickets twice a week for them, and the care on 1/8 - 1/4" crickets is pretty minimal. They will accept your roaches aswell. I never used flies with mine. but they did accept the odd waxworm, mealworm when I would offer small ones and loved silkworms. Also, they will eat pheonix worms, firebats, and etc.
3) They CAN be prolific, but it's usually because one male can, err, satisfy half a dozen females, minimise the number of ladies and you minimise the offspring. They werent in my care though I did find the odd baby whos egg had been layed, incubated and hatched all IN the terrarium without me knowing. Brevs usually lay between 1-4 eggs and more commonly 1-2 in my experience. I tend to dissagree with most on this part, I think other than their fragility, and our lack of ability to treat their miniature sicknesses, they seem to be great pets for people that are willing to put in some reading time, join our forum, and sit back and watch them. Adults and babies can seemingly live together without any issues that I have seen (roo might comment further?)
4)Brevs would probably be the hardiest and have resisted quite well to movement outside the glass. Secondly, they are hard to find! To someone unkowing, the terrarium would look like just a neat mini planted jungle, sans-life. Usually took me 5-10 minutes to find 4 or 5 since it was well planted.
A plaque mounted beside could say "DO NOT TOUCH GLASS" aswell as a breif detail on the species inside. Also, plexiglass or accrylic does not generate as much vibration as glass does when tapped. a pane infront of the tank, as in a double pane of glass, separated from its structure with some foam cusioning would dampen the resonation quite well I'd think.
Having the tank at the heing of 5' would elimate the children trouble, though maybe not the adults. The signs near the tank would eliminate most of the dummies who would tap. combined with proper dampening and I dont think you would have trouble.
The one in the photo isnt mine, but it looks fantastic.
5) You can tell her that these belong to your associates.
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