It doesn't end with the police. Let the dealers know you're on to them and they're not welcome. Be covert. Use asenine tactics. Give the police other reasons beyond drugs to visit their "cribs". Set off 1000rd firecracker packs in their front yards. Light their driveways on fire with gasoline. LET THEM KNOW THEY'RE NOT WANTED HERE. At 3am, set off 18 round fireworks displays on the edge of the road. It will get people's attention and make them less likely to want to sell thinking that everyone coming to the door is undercover. Don't do this every night. Wait a while in between strikes. DON'T FORM A PATTERN.