Fair point. But people can have opinions -- any kind they want. How they express them is what can be the problem.
As far as I am concerned, Giovinco isn't a Juve player and is unlikely to be one anytime soon. As long as you're more likely to be competition to Juve than someone on the club, you're a fair target in my book.
The Agnelli stuff is pure latent silliness. Adore Del Piero and all, but this is old news since October. Some people are gonna choose to be pining away for the 63-year-old Del Piero while a whole generation of Juve fans is going to grow up never seeing him play and having to pander with a, "Yes, we know, grandpa, Del Piero was the greatest." The problem is these future grandpas don't realize it, they are in denial of it, but they need to have their day in the sun a little. All within boundaries of the forum rules, of course.
And as far as love for Del Piero goes, anyone is welcome to it. Fanaticism welcome.