The best thing you can do is to report the spam caption using the "report" link that comes up when you hover over the caption. We get alerts if the caption has been reported enough times and we are able to ban spammers that way. The downvoting idea is not feasible because normal bad captions (not from spammers) would have the potential to be downvoted to -100 as well. 

To get the image URL, you will have to right click and open image in a new tab, or select "generate image links" and then click the images you wish to have URLs for. 

Try disabling Troll Emotions. 

Sounds like something with your computer.  Please make sure that your browser is fully updated, you have javascript turned on and you may want to disable add-ons/extensions.  

Click on change album settings and then click on the current album cover to select another. 

Unfortunately we don't have that information to share. 

Hiding an image is a permanent action. You will need to use the deletion code or the request deletion form to have it removed.  

We're working on both!