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Sports have been known to bring out the best in people -- showing people how to be a team player, developing team spirit, setting goals, etc. -- but in some cases, fans get way too into the game and take their obsession to the next level.

Here, AOL Sports takes a look at the worst fan-player clashes over the years -- everything from stalker moves, glass bottle injuries and crossing-the-line insults. Talk about unsportsmanlike conduct!