There's a few problems with that:

1. Gifting SBI to people is nothing like buying votes, it is locking your STEEM into a means of distributing it over time. There is 0 chance of getting a return on investment, it's just done to help others.
2. You obviously don't have a problem with vote-selling or -buying, as you've admitted that you ran a bidbot
3. You can't just attack people without warning if you want to convince them of something. If you have a problem with SBI, then present your case to people, instead of stealing their rewards.
4. I've got over 4x your SP, and I'm going to counter-act your down-votes from now on, unless what you down-voted was actually crap.

You are part of the problem with Steem, and why it is as small and empty as it is. Random assholes who decide they have the right to punish others for any reason they want.