Just observed the trending page...Basically, self-voting is widely accepted. The problem is, we all share the same rewards pool. Some votes here are worth more than others - while your vote may count to 0.1 SBD a wealthy person (whale) with massive SP can basically vote him/herself 300 SBD and much more! Yes, self-voting and buying votes from an outsiders view is unethical - there's a whole ongoing discussion about it here on Steemit. But, think within the platform, how you would succeed. Can you compete with a 300 SBD vote on subpar content that's guaranteed to hit the trending page with your 0.1 SBD vote and great content?