well our tailgate group likes to invite visting fans over, mostly because the ones that are walking by are doing just that, walking around. They don't have a tailgate to go to, maybe flew into town so don't have supplies, so we always make sure to have plenty of extra food and drinks. it's also nice meeting new people. the people in the nearby parking spaces all get along, and we usually walk from spot to spot to visit, and they are always welcome to stop by and eat, although they always do their own thing. i'm sure there are people that don't like some of the people they tailgate by or sit by in the stands. the guy that sits behind me bugs the crap out of me, i'm not mean to him tho, and if he walked by my tailgate and noticed me, i'd probably invite him over for a beer.