1) It's a public forum and you are but one member.
2) Nobody else has objected to his avatar but you.
3) If your step-son is old enough to surf the Internet unsupervised then he can fend for himself.
4) If your step-son isn't old enough to surf the Internet unsupervised then you are at fault, not blond boi.

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Wake up every day that would be a start.