Not just around but on here as well. I think half the time that is a big problem, other people e.g. customers who can end up starting something. If they where with EON and Scottish gas knocked there door, they wouldn't call EON and say send out the rough mob there after your lively hood.
However your still hear stories of rivalry getting out of hand, and not just in window cleaning, across the board in all trades. I think the main problem is the window cleaning industry has a relatively low entry price if your trad, which means anyone with a bucket, blade and ladders can compete with you weather they are anywhere near your level or not.
The Glasgow ice cream wars always comes to mind when I read topics like this. As well as all those gangland films about the days of corruption, allot of the oldies still remember. Nothing more than a small downside to society, some will always break the rules, and someone always pays the price.