Signed up online for a 30 Visitor E-Pass because I don't have a tag and needed to use the M7 twice in 1 day. Then a month later I get 2 bills from M7 for $16ea for avoiding paying the toll, bite me.
I don't have any e-tag because I don't believe in paying tolls, just like I avoid paying for parking like the plague (eg for AutoSalon I park in a back street 1km away and walk it instead of paying $20 for parking and i've only been to Parra Westfields by train because I refuse to park in their for security issues and every back street nearby costs money and i've never parked in the city - train it!).
I already pay enough tax with 3 rego's and fuel and then they want me to pay another tax just to use a road and park as well, bite me again.
Here is a really good website for toll roads and costs:
http://sydneymotorways.com/rta_map.html