I frequently cycle along a quiet, blocked-off lane which is a pleasant spot marred by the activities of fly-tippers. And also, possibly, d*gging, though I have less concrete evidence for this. Now, of the two clandestine activities, I'd much prefer the latter to be happening on that lane than the former. For one thing, it leaves a lot less mess (if you discount the odd used condom or ripped-up girlie mag). So: should I put up a sign to scare off the fly-tippers?