Sometimes, they suck so bad at grammar and spelling, you can't decipher what they are saying so you can't tell if they are a pedo phile or not.
See Pedobear, Grammar, Pedophile and Chris Hansen.
8 year old: ?
Pedrobear: Me gustas tu
8 year old: ....?
Pedrobear: Wanna see my snake?
8 year old: You have a snake? Where? :D
*Pedrobear drops his pants*
*8 year old runs away screaming*