Yes, it has been done.
Here is my install that I finished a few days ago. It went smoothly for the most part. I removed the left upper step that I never used once. I used the hardware from the step (bolts, nuts and washers, I bought two additional washers to finish the job)...I used putty (perhaps too much) between bracket and siding to make a water tight seal. Most of the 7"x7" bracket is flash with the aluminum siding, except for the left and right sides of the bracket which is lipped. This lip keeps the can approx. 1/4" away from the siding. I also painted the washers black to blend in. The bracket is tight and secure, and I am confident it will support a full can.
Thanks Kilroy for your impute.