most of the stuff i saw on the gc was cheat devices or abuses to special glitches someone spent hours to figure out. however dupeing meseta in pso was worthless since it could only be used to buy from the shop and have weapons identified. i don't know about psobb. i heard about alot of hacking in psoxbox. and ive heard of hacking in psu360 but not near the same level.
there have been alot of hacks on the psu ps2/pc but thats because of the pc version. heard they didn't ip ban anyone but lcoked accounts and the hackers just purchased new ones. (more money for sega).
so i don't know why this topic is asking this question when the reasons are:
1. they know how to do it and want to see how far they can go with it.
2. there bored.
3. they do it to cause missery and get a laugh.
4. they don't want to do any work so they hack to the top and then find out.
that since they hacked to the top theres nothing to do now and cause trouble.
5. they have various reasons that give them no right to take it out on others.