To all who may be reading this:
(I'm sure Peter knows all this)
I can't say that I'd recommend using RegEx "." as a trigger.
Not only does it have some, maybe substantial, performance hit, but it also:
- Will likely lead to an issue someday, causing something else to not work, and you won't have a clue as to why.
- Will fill up your KM log files
- Is a big price to pay for such a very, very small convenience.
The biggest problem of all software is unintended consequences.
Try not to shoot yourself in the foot. 
Sorry for the side note, Peter.