i know evil tricks
the one that works every time .......u get in the fender bender u get out of the car check on everyone make sure is ok ....(u act shaken up and to calm yourself u open a bottle kept in the car take a shot of jack or something in front of everyone after the cars have stopped moving ) .....this will keep them from giving u a breath test (they can not prove u were drunk) ask a lawyer one told me to do this
2nd one is the whizzinator
http://www.thewhizzinator.com/
put the first aid kit somewhere in your stuff .......my buddy worked for the DOD for 3 years with random test .....that kit is what he kept in the car (they tap on shoulder tell go to testing site pee in cup) he kept the job until the work was done
as for driving while stoned ....they have made up some crazy ass rules about it .......if u are a chronic smoker like me the lvls of THC in my blood stream is higher then the legal limits and i will go to jail for DUI/DWI .........right now the only way they can get 100% court worthy info is to give u a blood test (to get around that u say jehovah witness it is against my tenants to give blood) it will stop them right there and it can not be used against u .......i have used this
but watch out i heard that CO is working on a breath test to give with it being legal in that state