why "hackers" (kids) DoS sites that contain....
Because they can. Why do teenagers think they can hold their drink down? Why do they take up smoking? Why do they think that going from L plates to P plates makes them invincible? Because they can. We live in an era where boredom is often only replaced by entertainment that is either paid for or supplied by others. Self-made entertainment often involves destruction or obstruction of some sort.
....scripts and forums that help other people.
Help them? mIRCx content was more often corrupt in some way or other and this certainly isn't helpful. The site was more or less open to abuse by people wanting to shift IRC trojans or other infectious files and I guess some people took offence to it and returned the favour. A while back they closed down not only their webchat but also their IRC server which the webchat connected to. If they have redirected their URL then chances are they won't be back. Given the nature of some of the downloads they hosted/linked to, I am not so sure it's a bad thing.
