Ah Yes i remember you posting that now, but thought surely there must be another reason, that is absurd, you really must try and talk with your friends, you say they are loving,caring people and good friends, so you should be able to talk freely with them about it and hopefully convince them differently,maybe their kitties have UTI's or something, i bet they never considered that might be a cause for them peeing where they should not.

Good luck with trying to change their minds, as this really is the most unfair thing i have ever heard.