Guys, as fans, I think All of us deserve the rights to criticise any member of the Juventus Staff. But as mature smart fans, we have to make arguments based on things that should actually be measured and judged.
Capellp is a coach, he is paid as a coach, and people should criticise him based on his job as a coach, and whether or not he is doing well. That is the most acceptable criticism to him. A coaches job is to bring victory, not to play certain players, so to me it makes no sense if people criticise him just for not playing DP or even Zalayeta. As long as he's winning, then he's doin his job well.
As for Del Piero, I Think DP fans shouldn't see criticism as a direct assult or abuse. The same goes for him, DP is a paid player (paid a lot of money), his job is to perform in every match he is played in. If he doesn't perform, that means he's not doing his job well, which means his open for criticism. If you say he hasn't been played in enaough games, well that's not Capello's job to play him in every game. I think DP has had his share of first team football over the last years, including this year (for those who would counter argue that he hasn't been played in enough games to gain his form), and objectively, there are many strikers in Europe who could do it better. May be not do it as gracefully and skillful as him, but probably more effectively.
So lets limit the arguements based on the player's/coach's performance in doing their jobs, not off the field behavior or our personnal preference.