I handled it like you. Only upvote my relevant posts and comments. Something like "Cool article bro" does not deserve my own upvote. I'm new to steemit but don't you have limited voting power per day? It would be bad if you use all your power on your own posts and have nothing left for posts of other people who deserve a upvote. Can this happen?
Anyway, I'm feeling relieved that there are more people who are upvoting their own stuff.

PS: Cool article bro!