I need to report that I simply added the reddit button, used it, and was taken to task by reddit moderators for doing it. I suppose you need to consider if you make this available if it is not welcomed by the hitlers at reddit.
I read the rules to the board over at reddit and it didn’t say that. It had stuff I didn’t understand, such as ham sham blam scram and wham (or something like that). When I asked, I got fussed at again. No, they need to politely explain their policies in English for new users. And if WordPress offers a connection, you should be aware of and inform you bloggers that this isn’t to promote your blog.