Simple numbers makes this less of an issue than it would normally be. Those who would use their powers maliciously are in the minority, and the consequences would be great.
[Most of the reason Castiel isn't too concerned about this issue. He knows there are people here who are dangerous, and people who have harmed others, but they seem to keep it small-scale.]
Many of the powers are not of particular danger, such as mine, but though others might be difficult to counteract. However, the powers are no more or less difficult to protect oneself from than any other weapon.
[In other words, there's no reason to worry specifically because they're supernatural powers. Yes, it's smart to learn to protect themselves, but the powers are no more a threat than many other things.]
[Video]
[Most of the reason Castiel isn't too concerned about this issue. He knows there are people here who are dangerous, and people who have harmed others, but they seem to keep it small-scale.]
Many of the powers are not of particular danger, such as mine, but though others might be difficult to counteract. However, the powers are no more or less difficult to protect oneself from than any other weapon.
[In other words, there's no reason to worry specifically because they're supernatural powers. Yes, it's smart to learn to protect themselves, but the powers are no more a threat than many other things.]