but you can't expect me to comment on someone's post without liking it right? Not gonna feed them bullshit lies just to a small petty upvote from them. Do you get what I mean?
I would never expect anybody to upvote my articles in case he doesn't like them. However, if he likes them, then I see no reason not to upvote them as well (that's how Steemit is designed to work).
And of course in general you shouldn't upvote articles you don't like just to get upvotes in return. Instead of that just upvote articles which you like ... then you can enjoy receiving upvotes in return without feeling 'guilty'. :-)