It never ceases to amaze me the creative measures that people think up to try and evade immigrations laws, enter Brazil without the authorization required to do so, or to try and re-enter the country sooner than they are entitled to do so using any means possible.
Just remember that as a tourist NOBODY is permitted to remain in Brazil for more than 180 days (maximum) in any one year "rolling" time block. It does not matter if you have 10 different passports, trying to re-enter using a different passport once you've used up your 180 days is an immigrations violation.
PLEASE DO NOT ASK ME FOR ADVICE REGARDING THIS PRACTICE. THE ONLY ADVICE I WILL GIVE YOU IS DON'T DO IT.... IF YOU TRY, WHATEVER THE CONSEQUENCES MAY BE, YOU DO SO AT YOUR OWN RISK. YOU WILL NOT LIKE WHAT HAPPENS.
Cheers,
William James Woodward - Brazil & Canada Expert, Expat-blog Team