Given that the CTTT can only award costs in the case of mischievous or vexatious applications – and even then are reluctant to do so – I find it unlikely that such an event ever occurred. However, if a matter went to the CTTT and was then appealed at a proper court – like District or Supreme – costs may have been awarded.
I reckon you’ve got a bit of creative signage going on there. The idea is probably more to deter rogue parkers than inform them of what the real penalties might be. And hey, you can’t be fined for putting up an inaccurate sign.
My personal favourite is “Warning – cars parked illegally here have been vandalised” although ‘Polite Notice – No Parking’ is frequently misread, especially if the top bit of the t in polite is a bit indistinct.