RE: Flagging. Someone has to do it.
Mr. @sneak, I have a bone to pick with you...you recently downvoted one of our member's comments and I'm shocked, honestly. I'm assuming you may think it to be a spam bot and got confused. @sneaky-ninja is an account we have set up specifically for members of #thealliance to buy upvotes from via his delegation we set up. No different than @bellyrub or Rando or the goat or minnowbooster except it is done MANUALLY. All of our allies are good content creators as that is one of the stipulations because we won't vote on any rubbish. We are even writing a backstory for him and it's really quite good. In the future, please delve a little deeper into what you are actually downvoting.
@lukestokes, several of our members, including our witness, have taken to downvoting spammers. One thing I've seen recently, is they will leave a comment like 'nice post, upvoted'. Then, if you upvote or reply to that post, they will come back and edit the comment with several links and a beggars guise. I am assuming this is to prevent the initial downvote on the spam itself. Tricky, I wouldn't have noticed if the post wasn't hot. So, something else to watch out for :)
Post changing: Wow, that's shady. Yeah, with the 7 day payout it can be awkward if something you vote on gets turned into spam. Thankfully, everything is on the blockchain so it can clearly be shown what happened when.
As to your beef with sneak, maybe hit him up on chat first? Vote buying is generally something that is frowned upon here, but there are many forms of it, some better than others. If someone does a "vote up this post and I'll..." then that usually gets a downvote. I'm not familiar with what you're doing, but if the main developer from Steemit, inc doesn't like it, you may want to ask around in chat to figure out why.