The only LEO (in the US) that would even consider searching internet records from sites like RIU for growers are the Feds (DEA, etc.). And I can absolutely guarantee you that Federal LEO have no interest whatsoever in a little 6-12 plant grow. Hell, they probably wouldn't even give a crap about a 50 plant grow. They're looking for truly large volume professional grows, usually run by organized criminal gangs. Local cops may bust a small grow, but only if they stumble into it through a tip, smell, dumb ass move by the grower, etc.
I monitor the news pretty carefully and try to catch every grow bust I can. I've never seen one that happened because of internet communication. The cause of the bust generally falls into 4 catagories:
1) Rats - of the two legged variety. Tell no one!
2) Smell - your nosy neighbor smells the skunk and tips off LEO. Cover that stench!
3) Some other illegal activity attracts LEO attention - often stealing electricity in professional grows, but I've also seen cases of wife beaters, tax evaders, and others who got searched for some other reason and the cops found the grow as a bonus. Don't be a dumbass!
4) Damn bad luck - your house catches on fire and the fire department rats you out. You have a heart fart and the EMTs tip off the cops. A tree falls on your house in a wind storm and the insurance adjuster sees the grow, etc., etc. I recommend prayer and animal sacrifice to keep this bad mojo away.
I recently saw some poor bastard in Detroit who had a commercial op going in his house (file that under dumbass), and somebody broke into his house while he was out (probably to steal his weed). He had one of those siren-based burglar alarms installed. Well it did a great job of scaring away the burglar, but it also brought the fuzz right to his busted open door, and guess what they found! The moral of this story is that it is better to have a thief rip off your stash than have LEO steal your stash, your house, your money, and your freedom.
Anyways, be careful out there brothers and sisters, but don't fret too much about posting some bud porn on RIU.