Seriously, Dscho is serving as a wiki gardener as a volunteer, on his own time, for the good of the community. He is not being paid to do it, and in order for him to keep his daily gardening down to a few minutes' work, it's quite reasonable of him to make rapid assessments of edits and then decide what to do about it.
Completely unknown stranger walks in (never posted to Git mailing list, never submitted a patch) and the first thing he does is set up a user page with links back to his own site, which happen to be of a trollish nature. Dscho quite reasonably identifies it as likely spam, trolling or otherwise undesirable content, and deletes and bans. I would have done the same thing.
If the user in question really does have legit contributions to make, he'll come here and ask about getting unbanned, which is what this guy did, surprisingly. Having read the guy's blog post, however, I seriously doubt that he has anything useful to add to the wiki. Let him contribute something useful here first (ie. patches, or answering user questions) and he'll have proved himself to be something other than what he appears to be (a troll).