So planetmath is descending deeper and deeper into crankiness. There is a lot of quality content on planetmath (the vast majority), but as it allows total cranks to write entries the overall quality of the site deteriorates. The most recent example which is so far unchallenged by the admins (and is the reason why I am not writing new or updating my old entries there) is bc1. An good example of what I am talking about is this entry. Note that I am talking about version 1 in case he edited the entry which he does very often to his entries.
This guy even wrote on some CR geometry and of course got it wrong. But I got tired of the fight.
Anyway, I have just found the link above and thought it may be amusing. It should also serve as a warning about sites like planetmath.