[WikiEN-l] Best approach for dealing with... er... cranks?

[Chas Brown]

How do those on list suggest dealing with contributors like FWappler? 

http://www.wikipedia.org/wiki/User:Fwappler

See our current game of ping-pong:

http://www.wikipedia.org/wiki/Talk:Curve

He's polite, he's not a vandal, but (for those not mathematically
minded) he's really not contributing here. Although he's using
mathematical language, the result is basically gibberish.

Two thoughts come to mind:

(1) Ever terser reverts.
(2) Wait a few days, and ''then'' revert.

I figure if I do (2), he'll lose focus and play somewhere else; but
there's certainly no guarantee. In the meantime, we have incorrect
material in the 'pedia. Furthermore, it seems to "spread"; for example,
I notice that's he's also added incorrect material to the similar topic

http://www.wikipedia.org/wiki/Line

which I hesitate to revert lest it stimulate ''another'' flurry of
gibberish.

Any advice?

Cheers - Chas