it took me a while to figure out why the fuck none of the redditors had the block option up, then i realized it was more general and thought it was because i'm posting from a page.

it turns out that it doesn't work if you launch from youtube. the url is different. it might be because i'm a page.

solution is to copy the reddit user's id to a tab navigated to from directly inside google+.

i just blocked at least 100 of 'em. i hope it helps...