Drive-By Posts

Am I the only one noticing lots and lots of new posts from new users where they never return to check back with their urgent questions?       It's like they are cut-n-pastes from other forums.      I'm beginning to think these are just padding to make the forum look more busy than it really is. 

I'm getting very reluctant to bother replying to any of them as I don't believe they are real people.

Anyone else noticing this pattern?