Why
- this is in my opinion the most common default
- saves typing time
- helps new poll creators to not put incorrect values here, such as swapping 1, -1, and 0
What
- at Special:SecurePoll/create, have the default value of "minimum score" be -1 instead of blank
- at Special:SecurePoll/create, have the default value of "maximum score" be 1 instead of blank
- at Special:SecurePoll/create, have the default value of "default score" be 0 instead of blank
