I'd really prefer something more specific: Dusty Sucks Hendry Sucks Trib Sucks Neifi Sucks Jacque Jones Sucks Against Lefties Rusch is Fat etc. To me the Cubs as an entity suck so a shirt that says "Cubs Suck" is specific for me. But to your point I suppose everyone could just make their own and if they want to call out a specific sub-part of the group that's perfectically acceptable. No, the problem is that someone wearing a "Cubs Suck" shirt is perceived as a White Sox fan, a Cardinals fan, etc. If you are not specific in your complaint against the Cubs, it will be assumed that you're a supporter of another team. If you wear a shirt that says "ANDY MacPhail SUCKS," then those that see it will understand that you, a Cubs fan, are expressing displeasure with your team.