The messages have a faked "from" addresses @tiscali.co.uk and @gmail.com account, presumably those belonging to Bob Harrison in an attempt to get his mailboxes shut down.
Sample subjects are:
- Mutha Fuker
Sample body text:
- your son sexy nigger boob knobz knobs
- your father pusse phuker
- your mother asholes retard
- your son cnts cock head bitches knobs
- our daughter mutha fucker phuc
- your dad phuck sluts
- your son cocksucker fuker
Don't bother complaining to Tiscali or Gmail about this, BobBear is not sending out the spam. Instead, use a reporting service such as SpamCop to send a complaint back to whoever manages the sending machine.