Some people have boards that lead to questionable content, believe it or not. You really need to check their boards before following.
When pinning digital stamps that are free for a limited time, PLEASE pin the watermarked version. (This etiquette point comes from Lisa in the comment section on this post).
This protects the original artist and does not violate copyright on their digitals. Many pin without thought to this and to be honest, it is an unethical practise. Again check your sources!
I have some exciting news I'll be sharing in the next day or so! :-)