Other Fuel System Tank Assembly problems of the 2003 Toyota Matrix

Check engine light came on. Took my Matrix to dealer the very next day(am). Diagnosed as faulty charcoal fuel canister. Dealer informed me that the repairs would cost $430. 00 and that the problem is caused when the gas tank is "topped-off" when being filled completely. Since the vehicle is beyond the 36,000 mile warrantee, I'm expected to pay for the repair. I don't think that it's good or fair customer service. Especially,since it's illegal in the state of NJ to fuel your own vehicle ,and then becomes a circumstance beyond my control. Toyota needs to make people aware of this problem or fix it! from reading on the internet, it's a very common problem in most of Toyota's product line.