Read Penny Patton's post "A Matter of Scale - How scale affects content creation and land ownership in Second Life" in the SL Building and Texturing Forum. Out of whack scale is a major issue in Second Life.
(I'm one to talk about scale, eh? Perhaps, but consistent scale makes for verisimilitude. You can't be a giant[ess] if everything is built to a large scale.)
Thanks to Tateru Nino, without whose post on Dwell on It I'd not have known about Ms. Patton's essay.