If everyone
can make sysops, then a vandal with a handful of
sockpuppets can do constant vandalism, always resysoping any of his
accounts that are desysopped.
If everyone can edit pages, then a vandal with a handful of sockpuppets
can do constant vandalism, always reinstating any of his edits that are
reverted. Nice, you're refuting yourself :-)
Nonsense. We handle vandals with multiple accounts all the time. It
just requires multiple blocks. He'd have to have a very large number
of sockpuppets to get around them, and an easy way to change IP
address frequently to avoid being stopped by autoblock. If he tries to
edit anonymously, or create new accounts, we can semi-protect the
page. There are all kinds of things we can do, but only because admins
have powers that vandals don't. If you remove that advantage, then
vandals can pretty much do what they like.