An off-topic but important post:
Commenters should refrain from using indecent language for "StardustyPsyche".
Qur'an:“Invite (mankind, O Muhammad SAW) to the Way of your Lord (i.e. Islam) with wisdom (i.e. with the Divine Inspiration and the Quran) and fair preaching, and argue with them in a way that is better...
(Qur'an, Surah an-Nahl(16):125)
Once, a scholar entered into the presence of an ‘Abbaasi caliph and said: “I am going to admonish you in a harsh manner, so listen.” Upon hearing this, the caliph said: “O brother! Be gentle, for I am not worse than Pharaoh, and you are not better than Moosaa whom Allah addressed along with his brother, Haaroon, saying:
And speak to him [i.e. Pharoah] with gentle speech that perhaps he may be reminded or fear [ Allah ]."
(Qur'an, Surah Taha(20):44)
Hadith:Our religion does not even allow us to revile and abuse the sinner. Abu Hurayrah, may Allaah be pleased with him, reported: “A man drank alcohol so he was brought before the Prophet sallallaahu 'alaihi wa sallam who said: "Beat him (according to the rules set by Allah)." Abu Hurayrah, said: Some of us beat him with our hands, others with their sandals and still others with pieces of cloth. When the man went away, some said: May Allaah humiliate you! Whereupon, the Prophet sallallaahu 'alaihi wa sallam said: “Do not say that. Do not support Shaytaan against your fellow brother”. (Bukhaari).
Source:
http://www.alminbar.com/khutbaheng/334.htm‘The best amongst you are those who have the best manners and character.’ (Bukhaari)
“The Prophet (Sal Allaahu Alaiyhi wa Sallam) was not one who would abuse (others) or say obscene words, or curse (others)…” (Bukhaari)
“The inmates of Hell are of five types….” And among them he mentioned “…the miser, the liar and those who are in the habit of abusing people and using obscene and foul language.” (Muslim)
Source:
http://www.farhathashmi.com/articles-section/belief-and-introspection/foul-language/“Truly a man utters words to which he attaches no importance, and by them he falls into the Fire of Jahannam, and truly a man utters words to which he attaches no importance, and by them Allah raises him into the Garden.” (Bukhaari)
Source: Al-Muwatta Of Iman Malik Ibn Ana By Anas
From the cursory checking I've done, these narrations seem to be authentic. Even if, in the worst case scenario "StardustyPsyche" is actually insincere, words such as "filth" etc. should not be used against him by Muslims following Prophet Muhammad's example.
Furthermore, Allah knows best what is in the hearts of people, we are not in a position to make that judgement in this matter.
Regards,