some people, regular smoker or not, are unable to fail at most drug tests for THC, Ive seen it a million times in the hospital: someone says they smoke weed even mere hours before they came to the hospital and their test for marijuana is a big NEG - also witnessed people smoke weed outside the drug test facility and then go in and pass on multiple occasions.
This is not to say don't take the precautions, search the forums for 'staying within our laws' and you can read my thread 5 ways to pass your drug test.
Options from most effective to least effective:
1. Abstain from marijuana for several weeks.
2. get a prescription for marinol or its other forms and tell them you take marinol.
3. Synthetic Urine - Really good this stuff is what they use to calibrate their machines.
4. Use a flush technique using readily available products on the market or do the flush manually as I describe in the other thread.
5. Use someone else's urine - this is the most difficult to pull off as it must be fresh and you must keep it at body temp
The truth is that testing for marijuana methods we have in this day and age are not accurate nor fair, If left up to a real scientist to determine toxicity beyond a shadow of a doubt he/she could not do so with absolute confidence with today's technology. Drug testing is an absolute scam and society is its victim, not to mention it makes a mockery of our rights.