IMHO there shouldn't be any discussion about what is allowed and what not...
Sure, some skills are buggy and some other skills work different then other skills, but:
Both attacking and defending guild can benefit of it, thus its not that there is a unfair advantage to only the attacking or defending guild.
And of course because of the re-spawn point the effects are different for an attacking guild compared to the defending guild, but still, both sides can benefit of it.
Still.., personally i really hate it when someone keeps killing me that way.