Final vote: NO
Should probably use something that only allows 1 vote per IP address. I think strawpoll.com and livepoll.io can do that.
VPN voting is also not allowed with this poll. I personally use a VPN and will have to turn mine off to vote on this.
I doubt a single person would have 300 bots using a single ip address so the measure would be pretty useless anyway. I think restraining votes to a single IP address would not do much good and quite the contrary actually as I see no cases where it would be worthwhile.