Head on Whoring should be accepted, for this reason.
As it stands, people do not accept it, and they have a grudge against people who do it. People who play to enjoy themselves for the most part, as the melee players do. The melee players then proceed to do whatever they can to make the HoW players have an unenjoyable experience, and do whatever they can to make them quit the server. I would say that is fairly bad sportsmanship, especially from clans who speak of how they wish to play and enjoy themselves.
HoW'ing has been said to be fairly simple to beat, yet it is such a big deal apparently that people will spend a good deal of time ranting about it and doing their best to ruin other people's time for doing it. All of this while saying that their playing experience was ruined due to one or two players who play a certain way.
The excuse that they do this, then after killing you call you a n00b, and as such you are justified in hating HoW players, is just that. An excuse. If they're being ****y and arrogant, regardless of playstyle, they are being ****y and arrogant. It doesn't matter how someone plays, if they are a jerk, they are a jerk. You could be the greatest melee player ever, you could not only swoop in a circle but repeatedly swoop in a globe around the player, but if you do this then after killing a player call him a n00b and insult him, you're still just a jerk.
This whole argument stems from a mindset that ESF should only be about melee'ing, and that a choice by any one player to melee should force the other player to melee. Only under a certain set of rules though, and only with certain tactics. You'll always have people who are melee purists and believe in no other form of play then that, and you'll have players who play using all the techniques available to use, and all the strategies they wish.
If someone is playing a certain way, they are playing that way. If they're being annoying, that's completely different. HoW'ing should be accepted so that it isn't an excuse anymore. It doesn't matter if you're beaming people repeatedly, using headon's repeatedly to kill someone out of spite, or swooping repeatedly to kill them out of spite. You're not playing the game for your own fun, you're playing to get rid of their fun. If someone's being moronic and shouting off n00b and 0wn3d after every kill, feel free to kill them and tell them to stop being a jerk.
HoW'ing and the way many melee purists use it lumps people who play defensively into that arrogant status, while at the same time using an arrogant tone and speaking about how you want to spend your time making other people unhappy with their ESF time.
~~melodramatic finishing touch~~
If it bothers you that much to take their fun away, why don't you just crash the server like devil? I see no difference between you playing to make another person unhappy and to ruin their experience, and what he does to ruin your experiences.