Several sets of armor found in the ruins these days are designed to only be used by small characters and thus have "Only useable by: XXXXX" properties on them. A few ranks in use magic device can bypass this property very easily and allow medium characters to wear them. I suggest putting an OOC warning in the descriptions of the items that only small PCs should wear these, much like the description on Victoria Colivin's dress, because I have lately seen several humans wearing deep gnome leathers and chain.
Svirfneblin Equipment
Just going to bump this. Keep scoming up in game it seems. Especially with the Svirfneblin armor that you don't find in the ruins that doesn't have the racial limits.
Also noticed the svirfeblin helmet has the same issue not having the OOC reference on it.