He wouldn't attack the kids- during Weirdmageddon, I haven't nailed down specifics, but the worst he did to Bea was either force her to play happy family with him against her will, or put her in a bubble like Mabel's while he figured out what to do. By the time he gets to having others, he wouldn't want to hurt them either.

He's lost contact with the Hechmaniacs and wouldn't want to bring them back after they let him rot in the Theraprism for over a century, so he'd want to rule with his family. However, if they strongly resisted, he might be a bit more likely to actually listen at that point, although he'd certainly try to convince them that that since he's better he can do it differently now.