Discussion regarding the entirety of the franchise in a general (meta) sense, including such aspects as: production, trends, merchandise, fan culture, and more.
That depends on how you define "bad person". There's not a malicious bone in Goku's body, but are bad intentions really a prerequisite to being a bad person? Goku has repeatedly made decisions that explicitly endanger other people simply to satiate his desire for a good fight, and that level of selfishness could easily cause someone to label him as a bad person.
To a strong man, the end justifies the means. To a stronger man, the means justify the end.