I think it's pretty obvious if you look at the comments just prior to the [dead]ing. (It looked like ftse started exploring troll country.)
I see 10's of pretty good comments, some reasonable submissions and one comment that had only reached -2 when the account was killed. Surely modding to -7 or so would have sent the same message in a better way ? If someone would persist in behaviour like that you can always get rid of them but this seems to be a bit too trigger happy for my taste. Also, in spite of being 'dead' ftse continues to participate and as fa…
There wasn't enough comment history there to know whether or not it was about to become a troll account. A large part of the reason this community has been successful is that the editors are willing to ghost accounts if it looks like someone can't play nice.