I just got the most recent 407 bill yesterday and I now owe approx $800 - about $450 is tolls and transponder monthly charges the rest is administrative charges and interest. I now won't be able to renew my plate next month without paying it off. Luckily its not my main car but I want to sell it so I guess I'll have to pay the piper then.
These 407 operators are rogues. 16.6 cents per km is grand larceny.