"It puts the lotion on its skin..."
If you can picture a mascot saying that sentence—BANG—that's a creepy mascot.
It's not really their fault, however. By their very nature, people in big goofy costumes can be off-putting, and even the most well-meaning of mascots can come off as potential lurkers in this twisted day and age.
That being said, some of them bring the creepiness more than others. It's not an attitude thing; it's just a "this creature looks like it would enjoy smelling my pillows" thing.
Here are the creepiest mascots in sports. They're not bad mascots, necessarily—they're just the last ones you'd want to run into in a dark alley.