I just want to point out just to be realistic - if you 'snitch' on these kids on behalf of your daughter it's not going to make her situation better. She needs to block them, ignore them, or get off Facebook. It's hard to really give advice without understanding more details... but let her know that if she's being 'baited' then she needs to turn cheek and ignore it. Making fun of someone without any kind of response from them isn't very fun for very long.