1) Performing redundancy to the point of ridiculousness. 2) Creating a solution that utilizes far too many levels of redundancy to be taken seriously. 3) Having several fail-over's for something that will never fail, while ignoring other possible points of failure.
The hardware vendor insisted that we provide 8 network connections for each server, but every one of those connections went to the same switch. I ended up using a whole box of cables and a full 24 port switch. It was flat out redundulous!