A lot of times you don't need to use quotations. It's still proper as long as you cite the source, but many sites won't catch it. My GF has turned in a paper before that the site showed as 40% plagerized, but it was due to a block quote and other things that were done properly, but the software is too stupid to realize. It's for lazy professors

Ex: Though annoying, it can just come down to making sure the formatting is correct as it is worth the time to keep your credibility (SomeGuy #14).

I dind't need quotation because it's not his exact words, but still needs citation because it's just his post reworded. Most "turnitin" type programs don't see that and will give a false reading. Most papers, no matter what, will usually have a 10% plagerized number even if everything is done properly and such because of that. And it's also doing a wide sweep of the net, so you're bound to have SOME material that is similar