Discord allows Polls to be made by anyone without any way to disable it
Update: Discord has added a permission to disable Poll creation for server and channels.
After having it in a form of beta release has Discord started to publicly roll out their Poll feature to all servers.
This poll feature, while decent, lacks proper ways of moderation, as any user with Send Message channel permission can create a Poll without any way of preventing if, opening the floodgates for possible channel spam.