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No you are not strange! You were brought up with the right values and morals :)

Pixabay's whole purpose is to provide people with photos for use in blog posts and media production. That's why all their content is released CC0. I use them in my own blog posts and website all the time, because they WANT you to.

But to use a Pixabay photo and enter it into a photo contest is complete bullshit. On that, we can agree.

Pixabay is good if you then research the image further to make sure it has not been stolen and placed there. Pixabay makes no guarantees that the images are the original work of the person uploading them - it's up to the photographers to state that they own the copyright when they upload stuff, but we can all see how dishonest people can be when they want to make a fast buck. I've had my own images listed for sale all over the place - even EBay. LOL! I have had to send DMCA (digital millennium take down) notices to sites that offer my images free as wallpaper etc. The only really safe way of knowing that you are not using copyright work is to use your own!