Many thanks in advance!
A: Not at all, I always use IMGUR to host the images in my post and nothing was blocked.
Users reporting those are likely never used imgur before.
When copying your image link inside the [img][/img] tag, make sure that the one you copied has an image extension like .jpg, .png or .gif not the direct imgur picture link that ends with /hdjdbdhjd.
Anyone can test those post how they look if the images are displayed, even as a Newbie.
Simply go to the recent posts in your profile, there the images in your replies will load like you're a Junior Member.