I am fully willing to admit my proto-giant dad build was both A) Griefing and B) sort of a twink (though the gear can be accessed early on, just required knowhow which a regular player will not have).
Yes I killed Quelaag and Ceaseless first to get the Chaos Ember, went to the great Hollow and back to the Asylum to get Red titanite chunks to +2 the Chaos Zweihander, beat 4 Kings for the Red Eye orb and purposefully kept my soul level at around 20.
I had the FaP ring and Havel's ring, Stone armour, mask of the child and no shield.
For me it was more of a case of seeing if I could do it. I had already done a Soul Level 1 run and in NG+ invaded with a Tonberry setup (Skull Lantern left hand, Jagged ghost blade right hand, Black iron helm and gauntlets, steel chest and legs, casting Iron flesh on myself and kept walking even if it ran out) just for **** and giggles.
Anyway I invaded a couple of times in Parish, got invaded several times by other Twink characters which was kind of hilarious when they saw me in full getup they suddenly realise they've got a fight on their hands instead of a oneshot kill.
However after a while it becomes like kicking puppies, fun at first but you slowly lose interest because there just isn't any challenge (apart from one low level player using the Knight's shield, full chainmail armour and a Halberd who summoned phantoms (which I'm not going to complain about, I was being a ****, summoning phantoms on me is both expected and the most sensible move someone can do) who managed to whittle me down by rolling out the way of my attacks and punishing any whiffs I made with the R2).
So I proceeded on toward Anor Londo to buy the required Giant's armour, kept my SL around 50, beat O&S, beat Nito (so I could buy the Father mask off of patches) and did some farming in Lost Izalith to +5 the Chaos Zweihander and completed my giantdad, invaded from Anor Londo which I felt was more balanced since you can get elemental weapons by then and you're more likely to fight 2 v 1 against you.
I admit it is griefing, that I'm abusing my knowledge of the game by creating such a character but it is not something I see a long term sustained amount of fun in.