Then perhaps it would be helpful to point out why you don't find the resources useful or relevant. Downvoting should be reserved for low-substance comments, not for hiding (it literally has the effect of hiding things from other people) information which you think is useless to you.
Thanks for the response. If you don't find the resources useful or relevant, it seems to me that it would be better to reply with your reasoning and links to other resources. Or are you using "downvote" to mean "I disagree"?
I can't downvote yet so I'm not one of those who did - I was trying to give an explanation. I don't know the exact rules for downvoting but I assume some use it to say " not helpful".