If I remember correctly this was to prevent a type of code that posed a security risk (expression is a CSS command I think) The trick to use it is to put bits of random code in the middle.

You can see this on [topic not found]

Not a problem :D I unfortunately don't think that it is going to be changed. I am pretty sure it still presents risks. Of course I thought it was only on pet profiles xD Want me to lock this up?

locking this up :D (and as always very welcome :D)