As of late,I've noticed quite a large number of posts that are being tagged inconsistently.
Either a misspelt word in the tag, or in extreme cases- such as
rule34.booru.org/index.ph...&s=view&id=853974
,blatant anecdotal tagging.

Are there any measures in place to prevent something like this from becoming commonplace?

Is there any way to view the tag history in a post?

if you scroll down, all the way to the bottom. Then under tab history you see "tags"

Then you see the tag history.

Thanks a bunch sd
(no idea how I missed that)

Well that answers the second question,does anyone know about the first?

Hmm, looks like the guy blackeyes is the culprit. Looks like the problem is a bunch of meaningless tags. He seems pretty obsessed with the pic.

I looked around at his history, he's been all over with this sort of useless tagging. I'll try to clean up his mess as I can.