Devo Co-Founder -- 9/11 Themed Wedding ... Box Cutters Anyone?

The co-founder of Devo and his bride hung their faces off a Twin Towers cake to celebrate their marriage with the most bizarre, and possibly offensive, wedding reception ... EVER.

Jerry Casale -- Devo's singer and bassist -- married Krista Napp on Friday at Michael's Restaurant in Santa Monica. Of course, Friday marked the 14th anniversary of the September 11th attacks ... a fact the bride and groom made sure their guests would never forget.

Fact 1: Their cake was the World Trade Center, with their images on top of each tower.

Fact 2: Guests got real box cutters as party favors.

Fact 3: Their table setting cards had an image of a "Gerald & Krista" engraved box cutter.

If it seems outrageous and offensive to make the murder of 2,977 people the centerpiece of your wedding -- we're told Jerry and Krista's friends weren't the least bit fazed because they both have a dark and strange sense of humor.

As one guest put it ... Jerry has "real heart as an artist, and is a super sweet guy."