Gilardino has been targeted by Milan's boo-boys since the start of the season, while Dida was also the subject of whistles after his clanger against Siena on the weekend.
Maldini snapped: "After what they have done for Milan, they deserve better treatment.
"The hisses have surprised the players, but it happens at other stadiums.
"Dida is a champion of Europe, just like Gilardino."