Have you guys ever thought about this?

i thougt about that
Once 1 sec posted no keys working ofc it could be ninjaged

Troll attempts?Thought about it.But I think that there are mainly impolite ninjas.

I think once in awhile it happens, but I think there are more impolite ninjas then there are dishonest OPs.

°o° "look of faux shock"

Always

Dishonest OPs are dishonest and they should feel dishonest.

cxiong, check the TV Tropes articles WildMassGuessing and EpilepticTrees, perhaps also ParanoiaFuel.

Hmm... not a bad idea. If it was me I would post just one real unused key in hopes a grateful ninja finds it. Make myself look like I am so generous while I carefully plot to take over the world by joining as many private giveaway groups as possible. manical laugohter

Not that I would actually do that. Good point though.

i wonder about that now u mentioned it..
but i'm sure they themselves will be guilt ridden if they do so.

...

One day a group owner stole a bunch of used keys from an old source, then posted all on their group and said that all the members must put +rep on their profile. That guy's group and expensive account got pwned.

Tbh, yes :p

I have same once but we cannot proof that for now.
If Valve update Steam for notify who redeemed it like Desura, we can proof that. And then we can said what burn ninjas and trollers!

yeah i think that alot,because there is alot of threads where no one saying " i got this"