They are a force all their own. Which can be quite annoying to others. I know I've said some thoughtless things when I've been joking. There can be consequences to being a trickster. Whether it's getting kicked out of town like Robin Goodfellow is, or the nastier fate of Loki who is bound in the entrails of his own son, stinging venom dripping on his face.
Tricksters can be real jerks and it's easy to lose friends by being too much a trickster.
Let's face it, Bugs Bunny is fun to watch. Also, tricksters can be gullible idiots. The story of the trickster being tricked is a common motif. Puck gets confused in A Midsummer Night's Dream and gives the love potion to the wrong Athenians. He mistakes the watery reflection of plums for the real thing.