I honestly do not find this as a "serious" violation, since a small attempt to wallglitch of this type can be committed by anyone as an error or mistake (even if this one had been on purpose). However, Veteran is a player with necessary knowledge about the rules at LW server, so for me there's no reason to make him such punishment, like any other admin would have given a warning and an order to take into account that he should not do it anymore.
Also should be emphasized that guys like the "Russians" are always recording the game and 10 seconds video about a broken rule does not indicate how a player plays when having free development through the city.
Going back a bit to the main post on the forum, I do not understand what's the point of this, we will not kick away to a member for a slight infraction. Well, we have to accept that unfortunately one member was temp-banned for a valid reason raised on the server rules (which only exists on this server), but this wasn't even necessary.
I'm sure Vet has a reason or opinion to explain the fact happened.