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 am not convinced. The most important thing is restricting voting to sh.itheads only. Strawpoll can definitely not do this. I however agree with the fact that even basic VPN-protection is better than no protection. A solution would be checking a users activity, however this would obviously would be done manually, which is unsustainable. It is neat, certainly safer than the current method, but instance-locking is still primary.