I would love people to pin my ideas. If you think something on my blog is useful to you, it may be useful to others too, so why not pin it and share the ideas?
Copyright and other ethical considerations are a serious issue. I try very hard to be a good role model for my own students with regards to copyright ownership and teach them explicitly that ideas, images, music etc belong to people and we can't just "take without asking". This is going to be a huge thing for them in the future.
The ideas I share on my blog are there to share, so please, share away!
And if you really like my ideas, then follow my blog and encourage others to follow me too. :)