Selector,
While Vulching may seem dishonorable ( as much as it is frustrating when your vulched) it has historical basis and was common tactic. The intent was to destroy enemy aircraft on the ground to prevent them from potentially being a threat and to erode the ability to affect the mission or erode over all combat strength of Threat Air Forces.
I can see getting no perks (or even halving the perk value of that particular aircraft) for Vulching an Aircraft on approach to land or just beginning it's flight but, as underhanded as it may seem ethically, it has strategic and tactical advantages: The main one being demoralizing the enemy.
It would be cool if there was a distinction made between planes killed in the air vs planes killed on the ground.
I agree here, but the inclination by some players to use another pilot's "kill record" to erode his or her credibility and/or criticize his or her skill is ever present (and ultimately irrelevant considering the historical basis for Vulching being a legitimate tactic.) Ground kills were often counted seperately than air kills, and both counted towards the over all kill tally.
Eric Hartman had 300+ kills some of the MAY have been ground kills...perhaps approximately 92 of those kills
"Of his 352 victories, 260 were achieved against fighters " ("Eric Hartmann-Aces of Aces" by Christopher Bergstrom, N.d.;
http://www.elknet.pl/acestory/hartm/hartm1.htm, Accessed 2012)
We may never know but its safe to assume that ground kills were counted legitimately as an over all kill score.