Fixing the trending page would be fairly simple thing to do sort of:

1. Check to see if self voted if so no access to trending
2. Check to see if a vote bot was used, if so no access to trending.

But then you would get people saying that I think my content is worthy of my vote, if it is not worthy of my vote why would it be worthy to someone else. Also you would get, vote bots are allowed and available why should I not be able to be on the trending page just because I bought a vote. And then what I hear from all the people that want to keep using vote bots, "you can't tell them from real people, and if you did away with them then you would just have people getting more names and false accounts to upvote themselves.

I would bet that almost every individual that has responded to this post with a REP of more than 62 has used one or more vote bots. I would hazard a guess that more than 85% of the people with reps of 62 or more on steemit have used a vote bot on a post or two. So the problem will likely never go away.