I suppose we could start by focusing in on any train engineers who are either gleefully distributing 'an exclusive porn video' or setting up a pay-per-view website with a URL that goes something like "trainsex.co.uk"
http://www.captainsafetysite.com/trainsexsafety.html
* Introduction
* Whilst Bonking On The Station Platform
* On-board Train Procedures
* Making an obscene emergency call
* Electric Shock And The Male Genitalia
* Bonking or Wanking along the line without lookout protection
* Sexual Signalling Procedures
* Permission To Share Protection
* Meaning Of Terms Used In This Document