Gah, just got two more from the same number. Am currently resisting the urge to send a text back saying I AM NOT YOUR MUM, YOU FOOL, AND I'M NOT GIVING YOU A PENNY. With a possible added IT IS NOT MY FAULT THAT YOU HAVE SPENT ALL YOUR PHONE MONEY ON ALCOPOPS.

Methinks I may be contacting Comreg, though I'm not sure how O2 could avoid the possibility of user idiocy/maliciousness with this kind of service. Unless, hmm, it was one that the "generous parents and friends" had to opt-in to?