Truth be told, even a wild goose, as long as it's not the oldest toughest member of the flock, is a delicious treat. Wild geese have the disadvantage of relatively low fat content compared to domestic versions, so they take careful preparation so as not to dry out the meat. On the good side, the lean meat of a wild bird is healthier to eat than the grease packed domestic version. (There's a starter recipe at the end of this post suitable for cooking wild goose.)
If there is a risk of the St. Clair proposal it's that suburban geese can be extensively exposed to herbicide and pesticide treated lawns and may hang out and feed in streams and ponds that receive untreated sewerage overflows. The latter aspect may have something to do with why goose droppings cause beach closings: a problem of our own doing. A few lab tests by the MDNR could settle the question of whether the geese carry unsafe contamination levels. For now, at least, we have absolutely no reason to suspect a specific problem.
Think about Peak Oil, about what happens when the housing bubble eventually implodes, about the impact of extended drought and corn based ethanol on market prices for any corn fed meat. These are risk factors as well. The time may come when suburbanites are going to be wanting those geese for themselves. The soup kitchen diners should be so lucky.
The absolutely easiest way to cook a goose for the novice is to stew it, with skin off. Quarter the bird and pack the skinned pieces in a big covered pot or slow cooker with carrots and celery and onions and pieces of apple. Add salt and some spices like whole fennel seed, pepper corns, garam masala blend, curry...whatever you like...and cover with water. Simmer for several hours until the meat is tender. Remove the pieces and place on platter to cool. Separate the vegetable pieces from the broth using a colander and thicken it slightly with starch, adjusting flavor with additional spices. A cup of white wine recommended at this time. Plenty of fresh parsley flakes also a good addition toward the end. You can take it from there.