I don't think I have ever seen an overhead feeder in a dwelling, just the service drop ... unless you include that orange cord people string through the trees to their shed
For the purposes of electrocution, Christmas lights are as dangerous as a service drop. Probably more so since nobody considers them all that dangerous. The only difference is a fault on a service drop won't trip the O/C device but neither will a person "hung" (as in freezing current) on a lamp cord.