It depends really though. If you're wearing kneepads (and you should be if you're playing on sharp rocks, pulling stones out of an open gash for 10 minutes taught me that) pebbles and little rocks shouldn't be an issue. But I'm not going to dive headfirst into a 60 pound hunk of granite (or whatever the hell rock type it is) stretching 10 inches above the ground and then say "My what lovely fields!". Till we see how bad these fields are I wouldn't say much about wether Lasoya has a right to complain or not, because we don't know what state the grounds are in.
And cliffs... Who complains about cliffs? Imagine some sucker is laying a stream of paint right at your head, when suddenly you plummet 20 feet down a cliff and his paint flies harmlessly past. Who's gonna complain about something like that?