Well, if you forget the rules you can read them here https://community.ld4all.com/t/ld4all-forum-guidelines-read-this-first/21639 
Nothing wrong with linking to other sites except in your sig or if you link to product vendors. So the redcross link is okay. 
In sweden the age limit is 18 years.
So that seems like an odd connection, why would homosexual men be allowed to donate when homosexual women is?
I wonder what the reason is.