Yeah if you put the tags in the content of the posts they will get indexed and search should find them, keep in mind the body of the posts are searched when you search in "posts" so if you are only searching for titles they wont show up.
@srinik Think about it: Where/how does google make its money? Those big data relationship maps are more valuable than your post content. And that is why google bot finds and indexes even against robots.txt.
Yeah, I know googbot does not respect robots.txt and you need to create an account, use their tools, etc. to in efforts to potty train their bot. And therein... they can track even more big data. And googbot still indexes your profiles as it seems it pretty much has a mind of its own and carte blanche to do whatever since we all are so desperate for page rankings.
So, now that we've thought about it for five to ten seconds, do you still find this behavior surprising?
Heh, wife is an accountant: When confused: Follow the Money!!