A problem with eliminating downvoting is that the forum in the lead will pull further and further ahead of all the others. This is because forums with more upvotes are weighted to appear slightly more frequently than others (at least this used to be true and I believe it still is). This means that the more forums there are to vote on and the more forums there are with low votes (and of course there would be many more of these with no downvoting), the more the forum in front will pull ahead. If that logic were changed so that each forum was equally likely to appear, that would lead to less skewed voting results. And then, the main problem with eliminating downvoting would be a possible glut of entries that few people would want to wade through. So, your forums may not be downvoted, but they might not receive many upvotes either if they’re sufficiently buried among other entries. I’m not against trying it to see, though.