I rather lked this post before you edited it. Perhaps we should remove edit access, if people are going to abuse it.
Except the actual problem of abuse is practically nonexistant. You will only see it happen on very rare occasions, and usually only with problem users. The overwhelming majority of users
will use it as it is intended to be used. And even after all of THAT, an abusively-edited post/poll usually only concerns those who are actively in that thread and participating in the discussion at hand (unless of course they are forum suiciding and edited porn/gore into the post, which is an extremely unlikely event).
Also, don't forget that people are able to undo their own ratings on other posts, so once they realize that guy who made that effective thruster argument that they gave a thumbs-up or an "agree" to last week, had just edited the post to favor the opposite side of the argument, they can go and remove their upvotes on his post and change their rating of it to "disagree".
My point is that those reasons you gave for not having polls is absolutely ridiculous and employs
fallacious reasoning of a highly hypothetical nature. Giving users more freedom to edit their posts is crucial on this forum. The last thing we need is a place where people have to double-post or triple-post just because they can't edit their posts, or they have to duplicate their own threads just to edit a poll. Nobody is going to want to have to wait on the moderators to do everything for them. This is a forum, not an internet nursing home.
You have to give people the control they need in order to make effective posts. Oftentimes when I make posts, I later think of an even better thing to add to it or that I had since then made more content to share with people, so I could edit it in. You're telling us we should not be allowed to do that because some rare and crazy forumer once abused his own edit priveleges and got banned. That is absolutely ridiculous and highly-illogical fear-based reasoning.
As stated previously by someone else in this thread, why not simply have the poll automatically reset its votes every time it is edited? That's what the Blockland Forums does, and it's very effective. That way, people can't abuse it by creating deceptive votes, and it's a win-win for for everyone!