Could we have a captcha mechanism to avoid these spammers ? or are these paid humans ? (would an IP block work ?)

Great !

I think such polls help understand how many are interested or aware.

And filing a petition in court to clean up your neighbourhood sewage will be good.

Just knowing where your sewage goes, and where it is supposed to go would help.

If at all you want to do a petition etc, I suggest you try these:

1) Who have built houses and apartments by making false declarations about how they would provide and discharge water (builders)

2) Those who throw garbage into the drains and lakes, and then complain that these are dirty (refer a headline in a city paper today, where the tone was "BBMP is not cleaning the lakes", but nobody bothered to ask who threw all that trash and bottles and plastics in the lake in the first place. (residents)

Courts and past lawmakers have done enough, don't need any more legislations, don't need any new authorities or task forces. All we need is for us, you and me to spend some time to take some interest. If you don't, then everyone will do as they wish.

I know that the sewage from my apartment goes into a Septic tank / Soak Pit.