1st get a better idea of what warez is:
http://en.wikipedia.org/wiki/Warez
Try not to skim.
LOL I'm going to try my best to explain, no you are not stealing.
If you were using a dumbphone, yes. Windows Mobile 2003, yes. There would be serious issues with this.
"Why am I so honored but they aren't?" "So Genjinaro its ok for me to do it?" you ask.
Yes, those phones do not have this ability by any standard means & the carrier "must" unlock this feature.
Windows Mobile 5.2 & 6+ puts you in a grey area, by standard issue, Windows Mobile 6 allows you to share any Internet connection you have on your device, whether it be Wifi or 3G via BT or USB. If you carrier locks it somehow then its just a tampering of the standard feature, they can prevent but they cannot force the lock unless Microsoft does not grant permission to develop anything granting. (Their method seems sloppy trying to lock it with older WM6 phones.).
Microsoft allows you to do this legally with whatever connection.
Your rights are provided by them to use this & software can be developed to enhance this.
Because of is pre-existence in the OS + legal 3rd party development there is no sole or one way to get this service on a WM6 device.
Its access depends on the legitimate software creator & their intended use of this software. The creators of WMWifi have this right & they sell it to the end user for its intended use, Microsoft has granted this right to the end user. You already have the means from the OS developers and an optional service from the carrier.
^This is a shareware scenario
Read up here to see what you are entitled to in WM6
http://msdn.microsoft.com/en-us/library/bb158534.aspx
WMWifi is also a copyrighted software.
Now on the flip:
Lets say if Sprint made a "software" called "PAM-Connect" ($25 to buy with a monthly fee of $55) this software was the only way you could get PAM and any other way would have to be a modification of this software
& Joe-hackurphone post up a file of a racked version of "PAM-Connect" for all to use or even just himself or for the hell of it.
He did not develop this software, pay for everyone to use it, nor did he have the authority to enable this feature without the 1st 2 prerequisites.
^This would be Warez. Even if he renamed it and changed the code alittle it'd be Warez.
I really hope I helped somewhat in clearing this up.
Its a "grey cloud" answer Sprint can charge but cannot force you to use this as long as its legally featured to be apart of the WM6 OS and 3rd development is legally approved to make use of it.