[LightDestory]

I joined the forum this month and I don't know how much this "point system" works. But I can't agree with your idea. The only upvotes that you could get would be from staff during their routine of moderation & checking. For example I am active on Programming & Hardware section, I wrote a little article about P++ but it wasn't successful. I tried to help on problem such as printer but it was unsuccessful as well, I didn't get any feedback.
If you force the use of "upvote" every post will be a "If you liked, upvote please!", and for section of "low activity" such as programming will be a great hit, for users like me that posts mainly there.